Motor assembly and stage lighting fixture capable of slowing down the falling speed of stage lighting fixture after power failure

Abstract

The present invention relates to the field of power electronics, and provides a motor assembly and a stage lamp for slowing down the falling speed of a stage lamp after power failure. The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor; when the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a stepless capacitor. The stepper motor assembly for slowing down the falling speed of a stage lamp after power failure provided in an embodiment of the present invention slows down the falling speed of the stage lamp after power failure.

Description

Technical Field

[0001] The invention relates to the field of power electronics, and in particular to a motor component and a stage lamp capable of slowing down the falling speed of the stage lamp after power failure. Background Art

[0002] The lamp head of a stage light has components that move along the light path, such as a focusing lens and a magnifying glass, components that swing relative to the light path, such as a fogging lens and a prism, components that rotate relative to the light path, such as a rotating pattern disk, a fixed pattern disk, a color disk, and a cutter, and the lamp head and support arm of the stage light will also rotate. When these components remain stationary, the motor drive outputs a braking current, and the stepper motor generates a braking torque to keep the components stationary. When the lamp loses power, the motor drive loses power supply, and the motor has no braking current and braking force. The components are accelerated to fall downward by gravity. When the components fall to the lowest point at a high speed, a huge impact force will be generated, which may cause the components to deform or even be damaged.

[0003] The existing technology generally uses a brake motor for collision buffering. After power failure, the brake pads of the brake unit are used to brake the rotating shaft of the motor unit. However, this braking method will increase the thickness of the motor along the rotating shaft, and the price is much more expensive than ordinary motors. In addition, the brake pads will wear out during long-term work, reducing the braking force and affecting the buffering effect. Summary of the invention

[0004] The invention provides a motor component and a stage lamp for slowing down the falling speed of a stage lamp after power failure, aiming to slow down the falling speed of the stage lamp after power failure.

[0005] In a first aspect, the present invention provides a motor assembly for slowing down the falling speed of a stage lamp after power failure, wherein the motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor;

[0006] When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a non-polar capacitor.

[0007] In one embodiment, the automatic switching switch has at least one switch unit, which includes a common terminal, a normally closed terminal and a normally open terminal, the common terminal is connected to the winding of the AC motor, the normally closed terminal is connected to the capacitive load, and the normally open terminal is connected to the motor drive.

[0008] The two ends of each winding of the AC motor are respectively connected to the common end of one of the switch units, the normally closed end of the corresponding switch unit is respectively connected to the two ends of the capacitive load corresponding to the winding, and the normally open end of the corresponding switch unit is respectively connected to the two motor drivers corresponding to the winding.

[0009] The motor assembly is a two-phase motor assembly;

[0010] The two-phase motor assembly includes a motor drive, four switch units, two capacitive loads and a two-phase motor;

[0011] The common ends of the four switch units are respectively connected to the two ends of the two windings of the two-phase motor, the normally closed ends of the two switch units connected to the same winding are respectively connected to the two ends of a capacitive load, and the normally open ends of the two switch units connected to the same winding are connected to the motor drive output end.

[0012] The motor assembly is a three-phase motor assembly;

[0013] The three-phase motor assembly includes a motor drive, three switch units, three capacitive loads and a three-phase motor;

[0014] The motor drive output terminal is connected to the normally open terminals of the three switch units, and the common terminals of the three switch units are connected to the three windings of the three-phase motor;

[0015] The two ends of the three capacitive loads are connected in sequence to form a ring shape as a whole. The normally closed ends of the three switch units are connected to the two ends of a capacitive load in pairs.

[0016] The motor assembly is a three-phase motor assembly;

[0017] The three-phase motor assembly includes a motor drive, three switch units, three capacitive loads and a three-phase motor;

[0018] The motor drive output terminal is connected to the normally open terminals of the three switch units, and the common terminals of the three switch units are connected to the three windings of the three-phase motor;

[0019] One ends of the three capacitive loads are connected to each other in a radial shape as a whole, and the normally closed ends of the three switch units are respectively connected to the other end of a capacitive load.

[0020] One end of at least one winding in the AC motor is connected to a corresponding motor drive and one end of a capacitive load, and the other end is connected to a common end of a corresponding switch unit, a normally closed end of the corresponding switch unit is connected to the other end of the capacitive load corresponding to the winding, and a normally open end of the corresponding switch unit is connected to another motor drive corresponding to the winding.

[0021] The motor assembly is a two-phase motor assembly;

[0022] The two-phase motor assembly includes a motor drive, two switch units, two capacitive loads and a two-phase motor;

[0023] One end of each phase motor drive is connected to one end of a winding and one end of a capacitive load, the other end of the motor drive is connected to the normally open end of a switch unit, the common end of the corresponding switch unit is connected to the other end of the winding, and the normally closed end of the corresponding switch unit is connected to the other end of the capacitive load.

[0024] The motor assembly is a three-phase motor assembly;

[0025] The three-phase motor assembly includes a motor drive, two switch units, three capacitive loads and a three-phase motor;

[0026] The two output terminals of the motor drive are connected to the normally open terminals of the two switch units, and the common terminals of the two switch units are connected to the two windings of the three-phase motor;

[0027] The two ends of the three capacitive loads are connected in sequence, forming a ring shape as a whole. The normally closed ends of the two switch units are connected to the two ends of a capacitive load respectively, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the remaining end of the capacitive load.

[0028] Or one ends of the three capacitive loads are connected to each other in a radial shape as a whole, the normally closed ends of the two switch units are respectively connected to the other ends of the two capacitive loads, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the other end of the remaining capacitive load.

[0029] The automatic switching switch is a relay or a semiconductor switch circuit.

[0030] The capacitive load is a capacitor.

[0031] The capacitor is a non-polar capacitor. The maximum charge amount that the capacitive load can store is greater than or equal to the maximum charge amount generated by the AC motor in one electrical cycle.

[0032] The capacitance of the capacitive load is greater than or equal to 40 μF.

[0033] In a second aspect, the present invention provides a stage lighting fixture, comprising the motor assembly for reducing the falling speed of the stage lighting fixture after power failure as described in the first aspect.

[0034] In one embodiment, the stage lighting fixture includes a lamp head;

[0035] The lamp head is provided with a light source for generating a light beam and an effect device for intercepting the light beam to generate a light effect. The motor assembly drives the effect device to move along the light path or to swing or rotate relative to the light path.

[0036] The stage lamp comprises a lamp head, a support arm for supporting the rotation of the lamp head, and a chassis for supporting the rotation of the support arm;

[0037] The motor assembly drives the lamp head to rotate relative to the support arm and / or the support arm to rotate relative to the chassis.

[0038] The present invention provides a motor assembly and a stage lamp for slowing down the falling speed of a stage lamp after power failure. The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor. When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load.

[0039] The motor component for slowing down the falling speed of a stage lamp after power failure provided by the present invention connects two ends of a winding through a capacitive load after power failure, and the capacitive load causes the induced current phase to lead the induced voltage phase by 90°. The electromotive force generated by the armature magnetic field of the motor and the main magnetic field of the permanent magnet have the same direction, and a longitudinal axis magnetization armature reaction will be generated, the magnetic flux will increase, the induced voltage will rise, the induced current will rise, and the braking torque will increase, thereby slowing down the falling speed of the stage lamp after power failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is one of the circuit principle diagrams of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention;

[0042] Figure 2 This is the second circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention;

[0043] Figure 3 This is the third circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention;

[0044] Figure 4 This is the fourth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention;

[0045] Figure 5 This is the fifth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention;

[0046] Figure 6 It is a schematic diagram of the structure of the stage lighting provided by the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] For the sake of brevity and intuitiveness in description, the scheme of the present invention is explained below by describing several representative implementations. A large number of details in the implementations are only used to help understand the scheme of the present invention. However, it is obvious that the technical scheme of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the scheme of the present invention, some implementations are not described in detail, but only a framework is given. Hereinafter, "including" means "including but not limited to", and "according to..." means "at least according to..., but not limited to only according to...". Due to the language habits of Chinese, when the number of a component is not specifically specified below, it means that the component can be one or more, or can be understood as at least one.

[0049] Furthermore, the following is combined Figures 1 to 6 The present invention describes a motor assembly and a stage lamp for slowing down the falling speed of the stage lamp after power failure. Figure 1 This is one of the circuit principle diagrams of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention; Figure 2 This is the second circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention; Figure 3 This is the third circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention; Figure 4 This is the fourth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention; Figure 5 This is the fifth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention; Figure 6 It is a schematic diagram of the structure of the stage lighting provided by the present invention.

[0050] When the stage lamp in the embodiment of the present invention is working normally, the focusing lens, the magnifying glass and other components move along the optical path, the atomizing lens, the prism and other components swing relative to the optical path, the rotating pattern disk, the fixed pattern disk, the color plate disk, the cutter components and the like rotate relative to the optical path, and the lamp head and the support arm of the stage lamp also rotate. When these components remain stationary after the movement, the motor drive outputs a braking current, and the stepper motor generates a braking torque to keep the components stationary. When the lamp loses power, the motor drive loses power supply, the motor has no braking current and braking force, and the components are accelerated to fall by the downward gravity. The components fall to the lowest point at a high speed, which will generate a huge impact force, which may cause the components to deform or even damage the components. Therefore, in order to slow down the falling speed of the stage lamp after the power is off, the embodiment of the present invention provides a motor assembly that slows down the falling speed of the stage lamp after the power is off. When the stage lamp loses power, the motor assembly that slows down the falling speed of the stage lamp after the power is off generates an electromagnetic torque with braking properties to control the falling speed of the stage lamp.

[0051] Furthermore, the motor assembly that slows down the falling speed of the stage lighting fixture after power failure includes a motor drive, an automatic switching switch, a capacitive load and an AC motor. When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a non-polar capacitor. In this way, when the automatic switching switch is powered on, the winding of the AC motor is connected to the motor drive, and the AC motor works normally. When the automatic switching switch is powered off, the winding of the motor is connected to the capacitive load, and the capacitive load causes the induced current phase to lead the induced voltage phase by 90°. The direction of the electromotive force generated by the armature magnetic field of the motor and the main magnetic field of the permanent magnet is the same, and a longitudinal axis magnetization armature reaction will be generated. At this time, the magnetic flux increases, the induced voltage rises, the induced current rises, and the braking torque increases, which slows down the falling speed of the stage lighting fixture after power failure; and the capacitive load is a non-polar capacitor, which can realize forward and reverse charging within one electrical cycle of the AC motor, and always ensures that the charge generated by the AC motor is accommodated.

[0052] Multiple AC motors can share a capacitive load, or multiple windings of an AC motor can be connected in series to a capacitive load.

[0053] It should be noted that the automatic switching switch includes but is not limited to relays and semiconductor switch circuits, and the relays include DC relays and AC relays. The AC motor includes but is not limited to stepper motors and servo motors. The maximum amount of charge that the capacitive load can store is greater than or equal to the maximum amount of charge generated by the AC motor in one electrical cycle. The capacitive load will not be fully charged in one electrical cycle of the AC motor. In this way, the capacitive load will continue to charge and discharge and will never be fully charged, which will continue to increase the torque of the AC motor and continuously slow down the falling speed of the stage lamp after power failure. In an embodiment of the present invention, the capacitance of the capacitive load (polar capacitor) is greater than or equal to 40μF (microfarads). In one embodiment, the capacitance of the capacitive load can be 70μF, thereby ensuring that the AC motor can be smoothly braked after power failure without jamming or discontinuous movement.

[0054] It can be further understood that the switch of the automatic transfer switch is controlled by a control signal or is in a normally closed end or a normally open end due to power on and off, and the winding is a group of turns constituting an electrical circuit corresponding to the voltage value of the transformer. The common end of the automatic transfer switch is connected to the winding of the AC motor, the normally closed end of the automatic transfer switch is connected to the two ends of the capacitive load, and the normally open end of the automatic transfer switch is connected to the motor drive output end.

[0055] The present invention provides a motor assembly for slowing down the falling speed of a stage lamp after power failure. The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor. When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load.

[0056] The motor assembly for slowing down the falling speed of a stage lamp after power failure provided by the present invention slows down the falling speed of the stage lamp after power failure.

[0057] Furthermore, the automatic switching switch has at least one switch unit, which includes a common terminal, a normally closed terminal and a normally open terminal, the common terminal is connected to the winding of the AC motor, the normally closed terminal is connected to the capacitive load, and the normally open terminal is connected to the motor drive.

[0058] It should be noted that, in the above connection mode, when the automatic switch is powered off, both ends of the winding will switch from drive to capacitive load.

[0059] In one embodiment, referring to Figure 1 , Figure 1 This is one of the circuit principle diagrams of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention.

[0060] The motor assembly is a two-phase motor assembly. The two-phase motor assembly includes a motor drive, two automatic switching switches, two capacitive loads and a two-phase motor. It should be noted that in the embodiment of the present invention, each automatic switching switch includes two switch units. Therefore, the two-phase motor assembly in the embodiment of the present invention includes a motor drive, four switch units, two capacitive loads and a two-phase motor. The common ends of the four switch units are respectively connected to the two ends of the two windings of the two-phase motor, the normally closed ends of the two switch units connected to the same winding are respectively connected to the two ends of a capacitive load, and the normally open ends of the two switch units connected to the same winding are connected to the motor drive output end.

[0061] Therefore, it can be understood that the two-phase stepper motor assembly in the embodiment of the present invention includes a motor driver Driver, two switch units in the automatic switching switch K1, two switch units in the automatic switching switch K2, two capacitive loads (capacitive load C1 and capacitive load C2) and a two-phase motor M. Among them, the common terminal 3 of a switch unit in the automatic switching switch K1 is connected to the A+ end of the winding of the two-phase motor M, and the common terminal 6 of a switch unit in the automatic switching switch K1 is connected to the B+ end of the winding of the two-phase motor M. The common terminal 3 of a switch unit in the automatic switching switch K2 is connected to the A- end of the winding of the two-phase motor M, and the common terminal 6 of a switch unit in the automatic switching switch K2 is connected to the B- end of the winding of the two-phase motor M. It should be noted that each winding may correspond to two switch units of an automatic switching switch, instead of crossing each other.

[0062] Furthermore, the normally closed end 2 of a switch unit in the automatic transfer switch K1 and the normally closed end 2 of a switch unit in the automatic transfer switch K2 are connected to both ends of the capacitive load C1. The normally closed end 7 of a switch unit in the automatic transfer switch K1 and the normally closed end 7 of a switch unit in the automatic transfer switch K2 are connected to both ends of the capacitive load C2.

[0063] Further, the normally open end 4 of a switch unit in the automatic switching switch K1 is connected to the A+ end of the motor driver Driver, and the normally open end 5 of a switch unit in the automatic switching switch K1 is connected to the B+ end of the motor driver Driver. Further, the normally open end 4 of a switch unit in the automatic switching switch K2 is connected to the A- end of the motor driver Driver, and the normally open end 5 of a switch unit in the automatic switching switch K2 is connected to the B- end of the motor driver Driver.

[0064] For stage lighting, when the components of the stage lighting are in normal operation, the power supply is energized or the switch unit control signal outputs a coil closure signal, the coils of the two switch units in the automatic switching switch K1 are closure, and the coils of the two switch units in the automatic switching switch K2 are closure, the four switch units are in the normally open end, the motor driver Driver output is connected to the windings of the two-phase motor M through the normally open ends of the four switch units, and the two-phase motor M operates according to the motor driver Driver output signal.

[0065] When the components of the stage lighting fixture lose power, the coils of the two switch units in the automatic switching switch K1 lose power, and the coils of the two switch units in the automatic switching switch K2 lose power. The four switch units are in the normally closed state, and the windings of the two-phase motor M are connected to the capacitive loads C1 and C2. The components fall due to gravity and drive the two-phase motor M to rotate. The induced electromotive force generated by the rotation of the two-phase motor M is alternating current. The capacitive load has the function of blocking direct current and passing alternating current. The windings of the two-phase motor M can generate induced current, so that the two-phase motor M generates electromagnetic torque with braking properties. The principle of power failure of the components of the stage lighting fixture is as follows:

[0066] When the component falls from top to bottom, the component drives the stepper motor to rotate. At this time, the stepper motor is in a generator state. The induced electromotive force generated is alternating current. The capacitive load has the function of isolating direct current and passing alternating current. The motor winding can also generate induced current, and the motor has a braking torque. Since the capacity of the capacitive load is large enough, it will not cause current discontinuity.

[0067] Since the two ends of the winding are connected by a capacitive load, the capacitive load, as the load of the generator, is a capacitive load. The capacitive load will make the induced current phase lead the induced voltage phase by 90°. The direction of the electromotive force generated by the motor armature magnetic field and the main magnetic field of the permanent magnet is the same, which will produce a longitudinal axis magnetization armature reaction. At this time, the magnetic flux increases, the induced voltage rises, and the induced current rises. If the winding is directly short-circuited, it is equivalent to a resistive load with a very small resistance value. The resistive load has no magnetization or demagnetization effect.

[0068] The electromagnetic torque of the generator is the braking torque, and the electromagnetic force formula is:

[0069] F=NΔBli

[0070] The number of winding turns N and the closed path l of the conductor are inherent properties of the motor, and their values ​​remain unchanged. Since the motor is in the longitudinal axis magnetization armature reaction, the main magnetic flux ΔB increases, the induced current i increases, the electromagnetic force increases, the electromagnetic torque increases, and the motor braking torque increases. Therefore, at the same speed, the motor will produce a larger braking torque than when the winding is short-circuited. When the motor speed is lower, it can produce a braking torque equal to the gravity, so the components fall more slowly, or heavier components can be braked.

[0071] In one embodiment, referring to Figure 2 , Figure 2 This is the second circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention.

[0072] The motor assembly is a three-phase motor assembly; the three-phase motor assembly includes a motor drive, three automatic switching switches, three capacitive loads and a three-phase motor. It should be noted that in the embodiment of the present invention, each automatic switching switch includes a switch unit, therefore, the three-phase motor assembly in the embodiment of the present invention includes a motor drive, three switch units, three capacitive loads and a three-phase motor; the motor drive output end is connected to the normally open ends of the three switch units, and the common ends of the three switch units are connected to the three windings of the three-phase motor; the two ends of the three capacitive loads are connected in sequence, and the whole is in a ring shape, and the normally closed ends of the three switch units are connected to the two ends of a capacitive load in pairs.

[0073] Therefore, it can be understood that the three-phase stepper motor assembly in the embodiment of the present invention includes a motor driver Driver, a switching unit of an automatic switching switch K1, a switching unit of an automatic switching switch K2, a switching unit of an automatic switching switch K3, three capacitive loads (capacitive load C1, capacitive load C2 and capacitive load C3) and a three-phase stepper motor M.

[0074] Among them, the normally open end 5 of the switch unit of the automatic switching switch K1 is connected to the A-IN end of the motor driver Driver, the normally open end 5 of the switch unit of the automatic switching switch K2 is connected to the B-IN end of the motor driver Driver, and the normally open end 5 of the switch unit of the automatic switching switch K3 is connected to the C-IN end of the motor driver Driver.

[0075] Further, the common terminal 3 (A OUT) of the switch unit of the automatic switching switch K1 is connected to the A end of the winding of the three-phase motor M, the common terminal 3 (B OUT) of the switch unit of the automatic switching switch K2 is connected to the B end of the winding of the three-phase motor M, and the common terminal 3 (C OUT) of the switch unit of the automatic switching switch K3 is connected to the C end of the winding of the three-phase motor M.

[0076] Further, the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K2 are connected to both ends of the capacitive load C1, the normally closed end 4 of the switch unit of the automatic transfer switch K2 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to both ends of the capacitive load C2, and the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to both ends of the capacitive load C3.

[0077] Therefore, it can be understood that the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K2 are connected to the two ends of the capacitive load C1 as a pair, the normally closed end 4 of the switch unit of the automatic transfer switch K2 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to the two ends of the capacitive load C2 as a pair, and the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to the two ends of the capacitive load C3 as a pair.

[0078] It can be further understood that the two ends of the capacitive load C1, the capacitive load C2 and the capacitive load C3 are connected in sequence, forming a ring shape as a whole, and the normally closed ends of the switch unit of the automatic switching switch K1, the normally closed ends of the switch unit of the automatic switching switch K2 and the normally closed ends of the switch unit of the automatic switching switch K3 are connected to the two ends of a capacitive load in pairs.

[0079] The circuit operation of the three-phase stepper motor assembly in the embodiment of the present invention is consistent with the circuit operation of the two-phase stepper motor assembly, so it will not be described in detail here.

[0080] In one embodiment, referring to Figure 3 , Figure 3 This is the third circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention.

[0081] The motor assembly is a three-phase motor assembly; the three-phase motor assembly includes a motor drive, three automatic switching switches, three capacitive loads and a three-phase motor. It should be noted that in the embodiment of the present invention, each automatic switching switch includes a switch unit, therefore, the three-phase motor assembly in the embodiment of the present invention includes a motor drive, three switch units, three capacitive loads and a three-phase motor; the motor drive output end is connected to the normally open ends of the three switch units, and the common ends of the three switch units are connected to the three windings of the three-phase motor; one end of the three capacitive loads is connected to each other, and the whole is radial, and the normally closed ends of the three switch units are respectively connected to the other end of a capacitive load.

[0082] Therefore, it can be understood that the three-phase stepper motor assembly in the embodiment of the present invention includes a motor driver Driver, a switch unit of an automatic switching switch K1, a switch unit of an automatic switching switch K2, a switch unit of an automatic switching switch K3, three capacitive loads (capacitive load C1, capacitive load C2 and capacitive load C3) and a three-phase stepper motor M. The normally open end 5 of the switch unit of the automatic switching switch K1 is connected to the A-IN end of the motor driver Driver, the normally open end 5 of the switch unit of the automatic switching switch K2 is connected to the B-IN end of the motor driver Driver, and the normally open end 5 of the switch unit of the automatic switching switch K3 is connected to the C-IN end of the motor driver Driver.

[0083] Further, the common terminal 3 (A OUT) of the switch unit of the automatic switching switch K1 is connected to the A end of the winding of the three-phase motor M, the common terminal 3 (B OUT) of the switch unit of the automatic switching switch K2 is connected to the B end of the winding of the three-phase motor M, and the common terminal 3 (C OUT) of the switch unit of the automatic switching switch K3 is connected to the C end of the winding of the three-phase motor M.

[0084] Further, the normally closed end 4 of the switch unit of the automatic transfer switch K1 is connected to one end of the capacitive load C1, and the other end of the capacitive load C1 is connected to one end of the capacitive load C2 and one end of the capacitive load C3, respectively. The normally closed end 4 of the switch unit of the automatic transfer switch K2 is connected to one end of the capacitive load C2, and the other end of the capacitive load C2 is connected to one end of the capacitive load C1 and one end of the capacitive load C3, respectively. The normally closed end 4 of the switch unit of the automatic transfer switch K3 is connected to one end of the capacitive load C3, and the other end of the capacitive load C3 is connected to one end of the capacitive load C1 and one end of the capacitive load C2, respectively.

[0085] It can be understood that the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K2 are connected to one end of the capacitive load C1 and one end of the capacitive load C2 as a pair, and the other end of the capacitive load C1 and the other end of the capacitive load C2 are connected to each other. The normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to one end of the capacitive load C1 and one end of the capacitive load C3 as a pair, and the other end of the capacitive load C1 and the other end of the capacitive load C3 are connected to each other. The normally closed end 4 of the switch unit of the automatic transfer switch K2 and the normally closed end 4 of the switch unit of the automatic transfer switch K3 are connected to one end of the capacitive load C2 and one end of the capacitive load C3 as a pair, and the other end of the capacitive load C2 and the other end of the capacitive load C3 are connected to each other.

[0086] It can be further understood that one ends of the three capacitive loads, namely, the capacitive load C1, the capacitive load C2 and the capacitive load C3, are connected to each other in a radial shape as a whole, and the normally closed end of the switch unit of the automatic transfer switch K1, the normally closed end of the switch unit of the automatic transfer switch K2 and the normally closed end of the switch unit of the automatic transfer switch K3 are respectively connected to the other end of a capacitive load.

[0087] The circuit operation of the three-phase stepper motor assembly in the embodiment of the present invention is consistent with the circuit operation of the two-phase stepper motor assembly, so it will not be described in detail here.

[0088] Furthermore, one end of at least one winding in the AC motor is connected to one end of a corresponding motor drive and a capacitive load, and the other end is connected to the common end of the corresponding switch unit, the normally closed end of the corresponding switch unit is connected to the other end of the capacitive load corresponding to the winding, and the normally open end of the corresponding switch unit is connected to another motor drive corresponding to the winding. It should be noted that in the above connection mode, when the automatic switch is powered off, only one end of the winding will switch from the drive to the capacitive load, and the other end remains connected to both the drive and the capacitive load.

[0089] In one embodiment, referring to Figure 4 , Figure 4 This is the fourth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention.

[0090] The motor assembly is a two-phase motor assembly; the two-phase motor assembly includes a motor drive, an automatic switching switch, two capacitive loads and a two-phase motor. It should be noted that in the embodiment of the present invention, each automatic switching switch includes two switch units, therefore, the two-phase motor assembly in the embodiment of the present invention includes a two-phase motor assembly including a motor drive, two switch units, two capacitive loads and a two-phase motor; one end of each phase motor drive is connected to one end of a winding and one end of a capacitive load, the other end of the motor drive is connected to the normally open end of a switch unit, the common end of the corresponding switch unit is connected to the other end of the winding, and the normally closed end of the corresponding switch unit is connected to the other end of the capacitive load.

[0091] Therefore, it can be understood that the two-phase stepper motor assembly in the embodiment of the present invention includes a motor driver Driver, two switch units of the automatic switching switch K1, two capacitive loads (capacitive load C1 and capacitive load C2) and a two-phase motor M.

[0092] The normally closed end 2 of a switch unit of the automatic transfer switch K1 is connected to one end of the capacitive load C1, and the other end of the capacitive load C1 is connected to the A-end of the motor driver Driver, and the A-end of the motor driver Driver is also connected to the A-end of the winding of the two-phase motor M. The normally closed end 7 of a switch unit of the automatic transfer switch K1 is connected to one end of the capacitive load C2, and the other end of the capacitive load C2 is connected to the B+end of the motor driver Driver, and the B+end of the motor driver Driver is also connected to the B+end of the winding of the two-phase motor M.

[0093] Further, a common terminal 3 of a switch unit of the automatic switching switch K1 is connected to the A+ terminal of the winding of the two-phase motor M, and a common terminal 6 of a switch unit of the automatic switching switch K1 is connected to the B- terminal of the winding of the two-phase motor M. A normally open terminal 4 of a switch unit of the automatic switching switch K1 is connected to the A+ terminal of the motor driver Driver, and a normally open terminal 5 of a switch unit of the automatic switching switch K1 is connected to the B- terminal of the motor driver Driver.

[0094] It should be noted that Figure 4 This is just one of the connection methods. There are a total of 4 connection methods in the embodiment of the present invention, which are not listed here one by one.

[0095] When the motor is operating normally, the two switch unit windings of the automatic switching switch K1 are turned on and energized, and the two switch units of the automatic switching switch K1 are at the normally open end. At this time, the motor driver Driver output signal (A+ end and B- end) is connected to the two-phase motor M (A+ end and B- end) interface through the normally open ends of the two switch units of the automatic switching switch K1. At this time, the two-phase motor M operates according to the drive signal.

[0096] When the lamp loses power, the windings of the two switch units of the automatic switching switch K1 are disconnected, and the two switch units of the automatic switching switch K1 are at the normally closed end. At this time, the A+ end, A- end, B+ end, B- end of the winding of the two-phase motor M are connected to the two ends of the capacitive load C1 and the capacitive load C2 through the normally closed ends of the two switch units of the automatic switching switch K1.

[0097] The component falls due to gravity, driving the two-phase motor M to rotate. The induced electromotive force generated by the rotation of the two-phase motor M is alternating current. The capacitive load has the function of isolating direct current and passing alternating current. The winding of the two-phase motor M can generate induced current, causing the two-phase motor M to generate electromagnetic torque with braking properties.

[0098] In one embodiment, referring to Figure 5 , Figure 5 This is the fifth circuit schematic diagram of the motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention.

[0099] The motor assembly is a three-phase motor assembly; the three-phase motor assembly includes a motor drive, two automatic switching switches, three capacitive loads and a three-phase motor. It should be noted that in the embodiment of the present invention, each automatic switching switch includes a switch unit, therefore, the three-phase motor assembly in the embodiment of the present invention includes a motor drive, two switch units, three capacitive loads and a three-phase motor; the two output ends of the motor drive are connected to the normally open ends of the two switch units, and the common ends of the two switch units are connected to the two windings of the three-phase motor; the two ends of the three capacitive loads are connected in sequence, and the whole is in a ring shape, the normally closed ends of the two switch units are respectively connected to the two ends of a capacitive load, and the remaining output end of the motor drive and another winding of the three-phase motor are connected to the remaining end of the capacitive load, or one end of the three capacitive loads are connected to each other, and the whole is radial, the normally closed ends of the two switch units are respectively connected to the other ends of the two capacitive loads, and the remaining output end of the motor drive and another winding of the three-phase motor are connected to the other end of the remaining capacitive load.

[0100] Therefore, it can be understood that the three-phase stepper motor assembly in the embodiment of the present invention includes a motor driver Driver, a switching unit of an automatic switching switch K1, a switching unit of an automatic switching switch K2, three capacitive loads (capacitive load C1, capacitive load C2 and capacitive load C3) and a three-phase stepper motor M.

[0101] Among them, the normally open end 5 of the switch unit of the automatic switching switch K1 is connected to the A-IN end of the motor driver Driver, the normally open end 5 of the switch unit of the automatic switching switch K2 is connected to the B-IN end of the motor driver Driver, and the C-IN end of the motor driver Driver is connected to the C end of the winding of the three-phase motor M.

[0102] Furthermore, the common terminal 3 (A OUT) of the switch unit of the automatic switching switch K1 is connected to the A terminal of the winding of the three-phase motor M, and the common terminal 3 (B OUT) of the switch unit of the automatic switching switch K2 is connected to the B terminal of the winding of the three-phase motor M.

[0103] Further, the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K2 are connected to both ends of the capacitive load C1, the normally closed end 4 of the switch unit of the automatic transfer switch K2 and the C-IN end of the motor driver Driver are connected to both ends of the capacitive load C2, and the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the C-IN end of the motor driver Driver are connected to both ends of the capacitive load C3.

[0104] Therefore, it can be understood that the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the normally closed end 4 of the switch unit of the automatic transfer switch K2 are connected to the two ends of the capacitive load C1 as a pair, the normally closed end 4 of the switch unit of the automatic transfer switch K2 and the C-IN end of the motor driver Driver are connected to the two ends of the capacitive load C2 as a pair, and the normally closed end 4 of the switch unit of the automatic transfer switch K1 and the C-IN end of the motor driver Driver are connected to the two ends of the capacitive load C3 as a pair.

[0105] It can be further understood that the two ends of the capacitive load C1, the capacitive load C2 and the capacitive load C3 are connected in sequence, forming a ring shape as a whole, the normally closed end of the switch unit of the automatic switching switch K1 and the normally closed end of the switch unit of the automatic switching switch K2 are respectively connected to the two ends of a capacitive load, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the remaining end of the capacitive load.

[0106] Or it can also be understood that one ends of the three capacitive loads, capacitive load C1, capacitive load C2 and capacitive load C3, are connected to each other in a radial shape as a whole, the normally closed end of the switch unit of the automatic switching switch K1 and the normally closed end of the switch unit of the automatic switching switch K2 are respectively connected to the other ends of the two capacitive loads, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the other end of the remaining capacitive load.

[0107] The circuit operation of the three-phase stepper motor assembly in the embodiment of the present invention is consistent with the circuit operation of the two-phase stepper motor assembly, so it will not be described in detail here.

[0108] It should be noted that any of the five stepper motors (two two-phase stepper motors and three three-phase stepper motors) in the embodiment of the present invention can be applied to the power-off scenario of stage lighting fixtures, and any of the five stepper motors can slow down the falling speed of the stage lighting fixtures after power-off.

[0109] The present invention provides a motor assembly for slowing down the falling speed of a stage lamp after power failure. The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor. When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load.

[0110] After power failure, the present invention connects the two ends of the winding through a capacitive load. The capacitive load will make the induced current phase lead the induced voltage phase by 90 degrees. The electromotive force generated by the motor armature magnetic field and the main magnetic field of the permanent magnet has the same direction, which will produce a longitudinal axis magnetization armature reaction, increase the magnetic flux, increase the induced voltage, increase the induced current, increase the braking torque, and slow down the falling speed of the stage lamp after power failure.

[0111] Furthermore, the present invention also provides a stage lamp, which includes a motor component that slows down the falling speed of the stage lamp after power failure.

[0112] Further, the stage lamp includes a lamp head 110, in which a light source for generating a light beam and an effect device for intercepting the light beam to generate a light effect are arranged, and a motor assembly drives the effect device to move along the light path or swing or rotate relative to the light path, wherein the movement along the light path is one of a focusing lens 120 or a magnifying lens 130. The swinging or rotating of the light path is one of a prism 140, a fogging mirror, a fixed pattern plate, a rotating pattern plate, a color plate, a fire plate, an aperture or a cutter 150.

[0113] Furthermore, the stage lamp comprises a lamp head 110, a support arm 160 for supporting the rotation of the lamp head 110, and a chassis 170 for supporting the rotation of the support arm. The motor assembly drives the lamp head 110 to rotate relative to the support arm 160 and / or the support arm 160 to rotate relative to the chassis 170.

[0114] The motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention slows down the falling speed of the stage lamp after power failure, reduces the impact force of the components of the stage lamp when power is lost and falls, and better protects the components of the stage lamp. In particular, the focusing lens driven by a single stepper motor is equipped with multiple atomizing and prism motors, and the overall weight is relatively large. When driven by a single stepper motor, it will fall quickly when power is lost, and the motor winding short-circuit technical components will also fall quickly, and the braking torque is insufficient. The motor assembly for slowing down the falling speed of the stage lamp after power failure provided by the present invention slows down the falling speed of the stage lamp after power failure, and can effectively reduce the falling speed of the focusing lens.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A motor assembly for slowing down the falling speed of a stage lamp after power failure, characterized in that: The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor; When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a non-polar capacitor; The automatic switching switch has at least one switch unit, and the switch unit includes a common terminal, a normally closed terminal and a normally open terminal, the common terminal is connected to the winding of the AC motor, the normally closed terminal is connected to the capacitive load, and the normally open terminal is connected to the motor drive; The two ends of each winding of the AC motor are respectively connected to the common end of one of the switch units, the normally closed end of the corresponding switch unit is respectively connected to the two ends of the capacitive load corresponding to the winding, and the normally open end of the corresponding switch unit is respectively connected to the two motor drivers corresponding to the winding; The motor assembly is a two-phase motor assembly; The two-phase motor assembly includes a motor drive, four switch units, two capacitive loads and a two-phase motor; the common ends of the four switch units are respectively connected to the two ends of two windings of the two-phase motor, the normally closed ends of the two switch units connected to the same winding are respectively connected to the two ends of a capacitive load, and the normally open ends of the two switch units connected to the same winding are connected to the motor drive output end.

2. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 1 is characterized in that: The automatic switching switch is a relay or a semiconductor switch circuit.

3. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 1 is characterized in that: The maximum amount of charge that the capacitive load can store is greater than or equal to the amount of charge generated by the AC motor in one electrical cycle.

4. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 1, characterized in that: The capacitance of the capacitive load is greater than or equal to 40 μF.

5. A motor assembly for slowing down the falling speed of a stage lamp after power failure, characterized in that: The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor; When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a non-polar capacitor; The automatic switching switch has at least one switch unit, and the switch unit includes a common terminal, a normally closed terminal and a normally open terminal, the common terminal is connected to the winding of the AC motor, the normally closed terminal is connected to the capacitive load, and the normally open terminal is connected to the motor drive; The motor assembly is a three-phase motor assembly; The three-phase motor assembly includes a motor drive, three switch units, three capacitive loads and a three-phase motor; the motor drive output end is connected to the normally open ends of the three switch units, and the common ends of the three switch units are connected to the three windings of the three-phase motor; The two ends of the three capacitive loads are connected in sequence, forming a ring shape as a whole, and the normally closed ends of the three switch units are connected to the two ends of a capacitive load in pairs; or, one end of the three capacitive loads are connected to each other, forming a radial shape as a whole, and the normally closed ends of the three switch units are connected to the other end of a capacitive load respectively.

6. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 5, characterized in that: The automatic switching switch is a relay or a semiconductor switch circuit.

7. The motor assembly for slowing down the falling speed of the stage lamp after power failure according to claim 5, characterized in that: The maximum amount of charge that the capacitive load can store is greater than or equal to the amount of charge generated by the AC motor in one electrical cycle.

8. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 5, characterized in that: The capacitance of the capacitive load is greater than or equal to 40 μF.

9. A motor assembly for slowing down the falling speed of a stage lamp after power failure, characterized in that: The motor assembly includes a motor drive, an automatic switching switch, a capacitive load and an AC motor; When the automatic switching switch is powered on, the winding of the AC motor is kept connected to the motor drive; when the automatic switching switch is powered off, the winding of the AC motor is switched to be connected to the capacitive load, and the capacitive load is a non-polar capacitor; The automatic switching switch has at least one switch unit, and the switch unit includes a common terminal, a normally closed terminal and a normally open terminal, the common terminal is connected to the winding of the AC motor, the normally closed terminal is connected to the capacitive load, and the normally open terminal is connected to the motor drive; One end of at least one winding in the AC motor is connected to a corresponding motor drive and one end of a capacitive load, and the other end is connected to a common end of a corresponding switch unit, a normally closed end of the corresponding switch unit is connected to the other end of the capacitive load corresponding to the winding, and a normally open end of the corresponding switch unit is connected to another motor drive corresponding to the winding; The motor assembly is a three-phase motor assembly; The three-phase motor assembly includes a motor drive, two switch units, three capacitive loads and a three-phase motor; two output ends of the motor drive are connected to the normally open ends of the two switch units, and the common ends of the two switch units are connected to the two windings of the three-phase motor; The two ends of the three capacitive loads are connected in sequence, forming a ring shape as a whole. The normally closed ends of the two switch units are connected to the two ends of a capacitive load respectively, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the remaining end of the capacitive load. Or one ends of the three capacitive loads are connected to each other in a radial shape as a whole, the normally closed ends of the two switch units are respectively connected to the other ends of the two capacitive loads, and the remaining output end of the motor drive and the other winding of the three-phase motor are connected to the other end of the remaining capacitive load.

10. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 9, characterized in that: The automatic switching switch is a relay or a semiconductor switch circuit.

11. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 9, characterized in that: The maximum amount of charge that the capacitive load can store is greater than or equal to the amount of charge generated by the AC motor in one electrical cycle.

12. The motor assembly for slowing down the falling speed of a stage lamp after power failure according to claim 9, characterized in that: The capacitance of the capacitive load is greater than or equal to 40 μF.

13. A stage lighting fixture, comprising the motor assembly for reducing the falling speed of the stage lighting fixture after power failure according to any one of claims 1 to 12.

14. The stage lighting fixture according to claim 13, comprising a lamp head; The lamp head is provided with a light source for generating a light beam and an effect device for intercepting the light beam to generate a light effect. The motor assembly drives the effect device to move along the light path or to swing or rotate relative to the light path.

15. The stage lighting fixture according to claim 13, comprising a lamp head, a support arm for supporting the rotation of the lamp head, and a chassis for supporting the rotation of the support arm; The motor assembly drives the lamp head to rotate relative to the support arm and / or the support arm to rotate relative to the chassis.

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