Motor control method, device and system and storage medium

Abstract

The invention belongs to the technical field of electric appliances, and particularly relates to a motor control method, device and system and a storage medium, operation parameters of a motor are obtained, the rotation direction of the motor is determined according to the operation parameters, and the rotation direction comprises forward rotation and reverse rotation; if the rotation direction is forward rotation, a forward rotation alternating current contactor is controlled to be in an open state through a first silicon controlled rectifier, so that the motor rotates according to the forward rotation direction; if the rotating direction is reverse, a reverse alternating current contactor is controlled to be in an open state through a second silicon controlled rectifier, so that the motor rotates according to the reverse direction; the method controls the positive and negative rotation of the motor through the silicon controlled rectifier, thereby improving the operation power of the motor, and achieving the hardware interlocking of the positive and negative rotation of the motor.

Description

Technical Field

[0001] The present application belongs to the field of electrical technology, and specifically relates to a motor control method, device, system and storage medium. Background Art

[0002] The interlocking circuit of the motor forward and reverse control circuit is a common circuit design, which can ensure that the motor will not conflict and be damaged during the forward and reverse rotation process. The working principle of this circuit is realized through the interlocking mechanism. That is, when the motor rotates forward, the reverse signal is shielded, and when the motor rotates reversely, the forward signal is shielded.

[0003] In the prior art, the principle of interlocking the forward and reverse rotation of the motor is to use a relay, connect the normally closed contact on the forward wiring relay to the reverse wiring circuit, and connect the normally closed contact on the reverse wiring relay to the forward wiring circuit, thereby ensuring that the reverse circuit is disconnected when the forward power is supplied, and the forward circuit is disconnected when the reverse power is supplied.

[0004] However, on the one hand, since the contacts of the relay are easily oxidized or affected by the external environment, the relay is prone to poor contact during use; on the other hand, during use, the relay is prone to failure due to the wear of the mechanical contacts and the aging of the electromagnetic coil; and once a problem occurs with the relay, it will directly lead to the operation of the motor. Summary of the invention

[0005] The present application provides a motor control method, device, system and storage medium, which are used to solve the problem that a relay can only drive a motor to operate at low power and the accuracy of the relay controlling the forward and reverse rotation of the motor is low.

[0006] In a first aspect, the present application provides a motor control system, comprising: the motor control system comprises: a first thyristor, a second thyristor, a forward AC contactor, a reverse AC contactor, and a motor;

[0007] The first thyristor is connected to the forward AC contactor circuit, the first thyristor is used to control the opening and closing of the forward AC contactor, and the forward AC contactor is used to control the rotation direction of the motor;

[0008] The second thyristor is connected to the reversing AC contactor circuit, the second thyristor is used to control the opening and closing of the reversing AC contactor, and the reversing AC contactor is used to control the rotation direction of the motor;

[0009] The motor is respectively connected to the forward AC contactor and the reverse AC contactor circuits.

[0010] Optionally, the forward AC contactor comprises: a first coil, a first normally closed contact and a first contact module, and the reverse AC contactor comprises: a second coil, a second normally closed contact and a second contact module;

[0011] The first coil is connected to the first thyristor and the second normally closed contact respectively, and the first coil is used to control the opening and closing of the first contact module;

[0012] The second coil is connected to the second thyristor and the first normally closed contact respectively, the second coil is used to control the opening and closing of the second contact module, and the first normally closed contact is connected in parallel with the second normally closed contact;

[0013] The motor is connected to the first contact module and the second contact module respectively.

[0014] Optional, including:

[0015] When the first thyristor controls the forward AC contactor to be in an open state, the first normally closed contact is in an open state, and the rotation direction of the motor is forward;

[0016] When the second thyristor controls the reversing AC contactor to be in an open state, the second normally closed contact is in an open state, and the rotation direction of the motor is reverse.

[0017] Optionally, the motor control system further comprises: a motor thermostat and a detection point;

[0018] One end of the motor thermostat is connected to a power source, and the other end of the motor thermostat is connected to one end of the detection point, and the motor thermostat is used to detect whether the temperature of the motor is abnormal;

[0019] The other end of the detection point is connected to the first normally closed contact and the second normally closed contact respectively, and the detection point is used to detect whether the corresponding switch of the motor thermostat is disconnected.

[0020] In a second aspect, the present application provides a motor control method, comprising:

[0021] Acquire the operating parameters of the motor, and determine the rotation direction of the motor according to the operating parameters, wherein the rotation direction includes: forward rotation and reverse rotation;

[0022] If the rotation direction is forward, the forward AC contactor is controlled by the first thyristor to be in a closed state, so that the motor rotates in the forward direction;

[0023] If the rotation direction is reverse, the reverse AC contactor is controlled by the second thyristor to be in a closed state, so that the motor rotates in the reverse direction.

[0024] Optionally, controlling the forward AC contactor to be in an open state by using a first thyristor includes:

[0025] Controlling the first normally closed contact in the forward AC contactor to be in an open state by the first thyristor;

[0026] The method of controlling the reverse AC contactor to be in an open state by the second thyristor comprises:

[0027] The second normally closed contact in the reversing AC contactor is controlled by the second thyristor to be in an open state.

[0028] Optionally, the method further includes:

[0029] When the motor is in a running state, obtaining a motor temperature of the motor;

[0030] Determining whether the temperature of the motor is within a preset temperature range;

[0031] If yes, determine that the motor is currently in a normal state, and control the motor to continue rotating in the rotation direction;

[0032] If not, it is determined that the motor is currently in an abnormal state, and the motor is controlled to stop rotating.

[0033] In a third aspect, the present application provides a motor control device, comprising:

[0034] An acquisition module is used to acquire the operating parameters of the motor;

[0035] A determination module, used to determine the rotation direction of the motor according to the operating parameters, wherein the rotation direction includes: forward rotation and reverse rotation;

[0036] A control module, used for controlling the forward AC contactor to be in a closed state through a first thyristor when the rotation direction is forward, so that the motor rotates in the forward direction;

[0037] The control module is also used for controlling the reverse AC contactor to be in a closed state through the second thyristor when the rotation direction is reverse, so that the motor rotates in the reverse direction.

[0038] Optionally, the control module is specifically used to control the first normally closed contact in the forward AC contactor to be in an open state through the first thyristor;

[0039] The control module is further used to control the second normally closed contact in the reversing AC contactor to be in an open state through the second thyristor.

[0040] Optionally, the motor control device further includes: a judgment module;

[0041] The acquisition module is further used to acquire the motor temperature of the motor when the motor is in a running state;

[0042] The judging module is used to judge whether the motor temperature is within a preset temperature range;

[0043] The determination module is further configured to determine that the motor is currently in a normal state if the motor temperature is within a preset temperature range;

[0044] The control module is further used to control the motor to continue rotating in the rotation direction;

[0045] The determination module is also used to determine that the motor is currently in an abnormal state if the temperature of the motor is not within a preset temperature range, and control the motor to stop rotating.

[0046] In a fourth aspect, the present application provides a motor control device, comprising:

[0047] Memory;

[0048] processor;

[0049] Wherein, the memory stores computer-executable instructions;

[0050] The processor executes the computer-executable instructions stored in the memory to implement the motor control method as described in the above-mentioned second aspect and various possible implementations of the second aspect.

[0051] In a fifth aspect, the present application provides a computer storage medium, characterized in that the computer storage medium stores computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the motor control method as described in the second aspect and various possible implementations of the second aspect.

[0052] The motor control method provided in the present application obtains the operating parameters of the motor and determines the rotation direction of the motor according to the operating parameters, the rotation direction including forward and reverse. If the rotation direction is forward, the forward AC contactor is controlled to be in an open state by a first thyristor so that the motor rotates in the forward direction. If the rotation direction is reverse, the reverse AC contactor is controlled to be in an open state by a second thyristor so that the motor rotates in the reverse direction. The method realizes hardware interlocking of the forward and reverse rotation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0054] Figure 1 A scenario framework diagram of the motor control system provided for this application;

[0055] Figure 2 The process of the motor control method provided in this application Figure 1 ;

[0056] Figure 3 The process of the motor control method provided in this application Figure 2 ;

[0057] Figure 4 A schematic diagram of the structure of the motor control device provided in this application;

[0058] Figure 5 A schematic diagram of the structure of the motor control device provided in this application.

[0059] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0060] Figure markings: 1-first thyristor; 2-second thyristor; 3-forward AC contactor; 4-reverse AC contactor; 5-motor; 6-motor thermostat; 7-detection point; 31-first coil; 32-first contact module; 33-first normally closed contact; 41-second coil; 42-second contact module; 43-second normally closed contact. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein, for example.

[0063] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0064] The interlocking circuit of the motor forward and reverse control circuit is a common circuit design, which can ensure that the motor will not conflict and be damaged during the forward and reverse rotation process. The working principle of this circuit is realized through the interlocking mechanism. That is, when the motor rotates forward, the reverse signal is shielded, and when the motor rotates reversely, the forward signal is shielded.

[0065] In the prior art, controlling the forward and reverse rotation of the motor represents the clockwise and counterclockwise rotation of the motor. The clockwise rotation of the motor is the forward rotation of the motor, and the counterclockwise rotation of the motor is the reverse rotation of the motor. According to the forward and reverse control circuit diagram and its principle analysis. At the beginning, to achieve the forward and reverse rotation of the motor, as long as any two phases connected to the motor power supply line are reversed, the purpose of reversal can be achieved. Later, with the birth of the contactor, the forward and reverse circuit of the motor has also been further developed. The forward and reverse rotation of the motor can be controlled more flexibly and conveniently, and the protection circuit-interlocking and double interlocking are added to the circuit, and low voltage and long-distance frequent control can be achieved at the same time.

[0066] However, on the one hand, since the contacts of the relay are easily oxidized or affected by the external environment, the relay is prone to poor contact during use; on the other hand, during use, the relay is prone to failure due to the wear of the mechanical contacts and the aging of the electromagnetic coil; and once a problem occurs with the relay, it will directly lead to the operation of the motor.

[0067] In response to the above problems, the present application provides a motor control method, which obtains the operating parameters of the motor and determines the rotation direction of the motor according to the operating parameters, the rotation direction including: forward and reverse; if the rotation direction is forward, the forward AC contactor is controlled to be in an open state by a first thyristor to make the motor rotate in the forward direction; if the rotation direction is reverse, the reverse AC contactor is controlled to be in an open state by a second thyristor to make the motor rotate in the reverse direction; this method not only improves the power of the motor operation by controlling the forward and reverse rotation of the motor by the thyristor, but also realizes the hardware interlocking of the forward and reverse rotation of the motor.

[0068] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0069] Figure 1 This is a scene framework diagram of the motor control system provided in this application. Figure 1 As shown, the motor control system of this embodiment includes: a first thyristor 1; a second thyristor 2; a forward AC contactor 3; a reverse AC contactor 4; a motor 5; a motor thermostat 6; a detection point 7; a first coil 31; a first contact module 32; a first normally closed contact 33; a second coil 41; a second contact module 42; and a second normally closed contact 43.

[0070] Among them, the thyristor is a high-power electrical component, also known as a thyristor. It has the advantages of small size, high efficiency, and long life. In the automatic control system, it can be used as a high-power driving device to control high-power equipment with a small-power control. It has been widely used in AC and DC motor speed control systems, power control systems, and follow-up systems. The first thyristor 1 is used to control the forward AC contactor 3, and the second thyristor 2 is used to control the reverse AC contactor 4.

[0071] There are two reasons why thyristors are used to control the AC contactor in this embodiment. On the one hand, compared with relays, thyristors have a longer life and a smaller size than relays, so they can have advantages in installation and use time in controlling the forward and reverse rotation of the motor; on the other hand, due to the structure of the relay, the relay cannot control the rotation of a high-power motor, while the thyristor can achieve control of the high-power motor.

[0072] AC contactors often use three arc extinguishing methods: double-break electric arc extinguishing, longitudinal arc extinguishing and grid arc extinguishing. It is used to eliminate the arc generated by the moving and static contacts during the opening and closing process. The working principle of the AC contactor is to use the electromagnetic force and the spring force to achieve the connection and disconnection of the contacts. The AC contactor has two working states: de-energized state (released state) and energized state (action state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected to the armature drives the contact to move, so that the normally closed contact is broken and the contactor is in the energized state; when the attraction coil is de-energized, the electromagnetic attraction disappears, the armature is reopened, the normally open contact is closed, and the position spring is released, all contacts are reset, and the contactor is in the de-energized state.

[0073] In this embodiment, the AC contactor includes: a forward AC contactor 3 and a reverse AC contactor 4. The forward AC contactor is composed of a first coil 31, a first contact module 32 and a first normally closed contact 33, and the reverse AC contactor is composed of a second coil 41, a second contact module 42 and a second normally closed contact 43. After the forward AC contactor 3 is closed (that is, after the first normally closed contact 33 is disconnected, the first coil 31 generates an electromagnetic force, and the electromagnetic force closes the first contact module 32), the motor 5 is controlled to rotate forward, and after the reverse AC contactor 4 is closed (that is, after the second normally closed contact 43 is disconnected, the second coil 41 generates an electromagnetic force, and the electromagnetic force closes the second contact module 42), the motor 5 is controlled to rotate reversely.

[0074] The motor 5 refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction, and is generally installed in the equipment to drive the equipment to work.

[0075] The motor 5 in this embodiment may include: a single-phase motor and a three-phase motor. When the motor 5 is a single-phase motor (the first contact module 32 and the second contact module 42 each have only one contactor), the single-phase motor has only one input power coil, and the current provided by the power supply generates a magnetic field in the coil, and the rotor rotates through this magnetic field, and the output power of the single-phase motor is relatively low; when the motor 5 is a three-phase motor (the first contact module 32 and the second contact module 42 each have three contactors), the single-phase motor has three input power coils, and there is a certain gap between the magnetic fields generated by these coils. This gap causes the rotor to rotate continuously, and the output power of the single-phase motor is relatively large.

[0076] The motor thermostat 6 is a temperature sensing device that automatically opens or closes the circuit to keep the controlled part within a certain temperature range under normal operation. In this embodiment, the motor thermostat 6 is mainly used to measure the inner drum motor temperature and the fan motor temperature. When at least one of the inner drum motor temperature and the fan motor temperature exceeds the preset safety temperature, the motor thermostat will be disconnected to achieve the effect of protecting the motor.

[0077] The detection point 7 is used to detect the opening and closing of the motor thermostat 6. When the motor thermostat 6 is opened, the operation of the motor is stopped; when the motor thermostat 6 is closed, the operation of the motor is controlled.

[0078] The connection mode of each component in the motor control system of this embodiment is specifically as follows: the first coil is connected to the first thyristor and the second normally closed contact respectively, and the first coil is used to control the opening and closing of the first contact module;

[0079] The second coil is connected to the second thyristor and the first normally closed contact respectively, the second coil is used to control the opening and closing of the second contact module, and the first normally closed contact is connected in parallel with the second normally closed contact;

[0080] The motor is connected to the first contact module and the second contact module respectively.

[0081] When the first thyristor controls the forward AC contactor to be in an open state, the first normally closed contact is in an open state, and the rotation direction of the motor is forward;

[0082] When the second thyristor controls the reversing AC contactor to be in an open state, the second normally closed contact is in an open state, and the rotation direction of the motor is reverse.

[0083] One end of the motor thermostat is connected to a power source, and the other end of the motor thermostat is connected to one end of the detection point, and the motor thermostat is used to detect whether the temperature of the motor is abnormal;

[0084] The other end of the detection point is connected to the first normally closed contact and the second normally closed contact respectively, and the detection point is used to detect whether the corresponding switch of the motor thermostat is disconnected.

[0085] It can be understood that one connection method of each component is: power supply-first thyristor 1-first coil 31-second normally closed contact 43-detection point 7-motor thermostat 6-power supply and first contact module 32-motor 5-power supply; the current direction of this path is: A→B and D→C→B; when the circuits of A→B and D→C→B are turned on, when the forward AC contactor 3 is closed, the second normally closed contact 43 is disconnected, and the first normally closed contact 43 remains closed, and the power supply-first thyristor 1-first coil 31-second normally closed contact 43-detection point 7-motor thermostat 6-power supply is connected, at this time the first coil will generate electromagnetism, and the electromagnetism will cause the first contact module 32 to close, thereby causing the motor 5 to run forward.

[0086] Another connection method of each component is: power supply-second thyristor 2-second coil 41-first normally closed contact 33-detection point 7-motor thermostat 6-power supply and second contact module 42-motor 5-power supply; the current flow of this path is: E→F and D→H→G→F; when the circuits of E→F and D→H→G→F are turned on, when the reversing AC contactor 4 is closed, the first normally closed contact 33 remains closed, the second normally closed contact 43 is disconnected, and the power supply-second thyristor 2-second coil 41-first normally closed contact 33-detection point 7-motor thermostat 6-power supply is connected, at this time the second coil will generate electromagnetism, and the electromagnetism will close the second contact module 42, thereby causing the motor 5 to reverse.

[0087] In this embodiment, the first thyristor 1 and the second thyristor 2 control the forward AC contactor 3 and the reverse AC contactor 4, so that the motor can achieve forward and reverse interlocking.

[0088] Figure 2This is the process of the motor control method provided by this application Figure 1 .like Figure 2 As shown, the motor control method provided in this embodiment includes:

[0089] S101: Acquire operating parameters of a motor, and determine a rotation direction of the motor according to the operating parameters, where the rotation direction includes forward rotation and reverse rotation.

[0090] The operating parameters are used to indicate the parameters of the timing, speed and direction corresponding to the forward and reverse rotation of the motor.

[0091] Before controlling the motor, the working requirements of the corresponding equipment of the motor must be analyzed to analyze the timing, rotation speed and rotation direction of the motor, so as to set the motor rotation timing, rotation speed and rotation direction according to the working requirements. Therefore, before the motor works, the operating parameters of the motor must be obtained first to determine the rotation direction of the motor.

[0092] S102: If the rotation direction is forward, the forward AC contactor is controlled by the first thyristor to be in a closed state, so that the motor rotates in the forward direction.

[0093] When the motor rotation direction obtained is forward, it means that the motor needs to rotate forward at this time, and the principle of controlling the motor forward rotation is: the first thyristor controls the forward AC contactor to close, at this time, the first coil generates electromagnetism, and the electromagnetism generated by the first coil will control the first contact module to close, when the first contact module is closed, the motor starts to rotate forward.

[0094] S103: If the rotation direction is reverse, the reverse AC contactor is controlled by the second thyristor to be in a closed state, so that the motor rotates in the reverse direction.

[0095] When the motor rotation direction obtained is reverse, it means that the motor needs to reverse at this time, and the principle of controlling the motor reversal is: the second thyristor controls the reversing AC contactor to close, at this time, the second coil generates electromagnetism, and the electromagnetism generated by the second coil will control the second contact module to close, when the second contact module is closed, the motor starts to reverse.

[0096] The motor control method provided in this embodiment obtains the operating parameters of the motor and determines the rotation direction of the motor according to the operating parameters. The rotation direction includes: forward and reverse. If the rotation direction is forward, the forward AC contactor is controlled to be in an open state by a first thyristor to make the motor rotate in the forward direction. If the rotation direction is reverse, the reverse AC contactor is controlled to be in an open state by a second thyristor to make the motor rotate in the reverse direction. The method realizes the hardware interlocking of the forward and reverse rotation of the motor.

[0097] Figure 3 This is the process of the motor control method provided by this application Figure 2 .like Figure 3 As shown, in this embodiment Figure 3 Based on the embodiment, the motor control method is described in detail. The motor control method shown in this embodiment includes:

[0098] S201: Acquire operating parameters of the motor, and determine the rotation direction of the motor according to the operating parameters, where the rotation direction includes forward rotation and reverse rotation.

[0099] Among them, step S201 is similar to the above step S101 and will not be repeated here.

[0100] S202: If the rotation direction is forward, the first normally closed contact in the forward AC contactor is controlled to be in an open state by the first thyristor, so that the motor rotates in the forward direction.

[0101] When the motor rotation direction obtained is forward, it means that the motor needs to rotate forward at this time, and the principle of controlling the motor forward rotation is: the first thyristor controls the closure of the forward AC contactor. At this time, the first normally closed contact opens, and the first coil generates an electromagnetic, and the electromagnetic generated by the first coil controls the closure of the first contact module. When the first contact module is closed, the motor starts to rotate forward.

[0102] S203: If the rotation direction is reverse, the second normally closed contact in the reverse AC contactor is controlled to be in an open state by the second thyristor, so that the motor rotates in the reverse direction.

[0103] When the motor rotation direction obtained is reverse, it means that the motor needs to reverse at this time, and the principle of controlling the motor reversal is: the second thyristor is closed by controlling the reversal AC contactor, at this time the second normally closed contact is opened, and the second coil generates electromagnetism, and the electromagnetism generated by the second coil will control the second contact module to close. When the second contact module is closed, the motor starts to reverse.

[0104] S204: When the motor is in a running state, obtaining a motor temperature of the motor.

[0105] The motor generates heat during its rotation due to friction with surrounding equipment and conversion of part of the input electrical energy into the motor's own heat energy. In order to prevent the motor from being damaged due to excessive motor temperature during operation, a thermostat can be installed to detect the motor temperature. Therefore, the motor temperature can be obtained when the motor is in operation.

[0106] S205: Determine whether the motor temperature is within a preset temperature range; if so, execute step S206; if not, execute step S207;

[0107] The preset temperature range is a temperature that will not damage the motor, so it is necessary to compare the motor temperature with the preset temperature range. When the motor temperature is within the preset temperature range, it is determined that the motor is currently in a normal state, and the motor is controlled to continue rotating in the rotation direction; when the motor temperature is not within the preset temperature range, it is determined that the motor is currently in an abnormal state, and the motor is controlled to stop rotating.

[0108] S206: When the temperature of the motor is within a preset temperature range, determine that the motor is currently in a normal state, and control the motor to continue rotating in the rotation direction.

[0109] When the motor temperature is within the preset temperature range, it means that the temperature to which the motor is currently running will not damage the motor. Therefore, the motor is currently in a normal state. At this time, the motor can continue to rotate in the direction of rotation.

[0110] S207: When the temperature of the motor is not within the preset temperature range, determining that the motor is currently in an abnormal state, and controlling the motor to stop rotating.

[0111] When the motor temperature is not within the preset temperature range, it means that the temperature to which the motor is currently running will damage the motor. Therefore, the motor is currently in an abnormal state and the motor will stop rotating.

[0112] When the motor is in an abnormal state and stops rotating, it is necessary to determine whether the operating state of the motor thermostat is in the disconnected state; when the operating state of the motor thermostat is in the disconnected state, an alarm instruction is generated and sent. The alarm instruction is used to indicate that the motor is currently in an abnormal state, so that the user can understand the reason why the motor stopped rotating.

[0113] The motor control method provided in the present embodiment obtains the operating parameters of the motor and determines the rotation direction of the motor according to the operating parameters. The rotation direction includes forward and reverse. If the rotation direction is forward, the first normally closed contact in the forward AC contactor is controlled to be in an open state by the first thyristor so that the motor rotates in the forward direction. If the rotation direction is reverse, the second normally closed contact in the reverse AC contactor is controlled to be in an open state by the second thyristor so that the motor rotates in the reverse direction. When the motor is in the operating state, the motor temperature of the motor is obtained. When the motor temperature is within a preset temperature range, it is determined that the motor is currently in a normal state, and the motor is controlled to continue to rotate in the rotation direction. When the motor temperature is not within the preset temperature range, it is determined that the motor is currently in an abnormal state, and the motor is controlled to stop rotating. The method realizes the hardware interlocking of the forward and reverse rotation of the motor, and at the same time, the motor thermostat is used to protect the motor.

[0114] Figure 4 This is a schematic diagram of the structure of the motor control device provided in this application. Figure 4 As shown, the present application provides a motor control device, the motor control device 300 includes:

[0115] An acquisition module 301 is used to acquire the operating parameters of the motor;

[0116] The determination module 302 is used to determine the rotation direction of the motor according to the operating parameters, and the rotation direction includes: forward rotation and reverse rotation;

[0117] The control module 303 is used for controlling the forward AC contactor to be in a closed state through a first thyristor when the rotation direction is forward, so that the motor rotates in the forward direction;

[0118] The control module 303 is also used for controlling the reverse AC contactor to be in a closed state through the second thyristor when the rotation direction is reverse, so that the motor rotates in the reverse direction.

[0119] Optionally, the control module 303 is specifically configured to control the first normally closed contact in the forward AC contactor to be in an open state through the first thyristor;

[0120] The control module 303 is further configured to control the second normally closed contact in the reversing AC contactor to be in an open state through the second thyristor.

[0121] Optionally, the motor control device further includes: a judgment module 304;

[0122] The acquisition module 301 is further used to acquire the motor temperature of the motor when the motor is in a running state;

[0123] The judging module 304 is used to judge whether the motor temperature is within a preset temperature range;

[0124] The determination module 302 is further configured to determine that the motor is currently in a normal state if the motor temperature is within a preset temperature range;

[0125] The control module 303 is further used to control the motor to continue rotating in the rotation direction;

[0126] The determination module 302 is further configured to determine that the motor is currently in an abnormal state if the temperature of the motor is not within a preset temperature range, and control the motor to stop rotating.

[0127] Figure 5 This is a schematic diagram of the structure of the motor control device provided in this application. Figure 5 As shown, the present application provides a motor control device, and the motor control 400 includes: a receiver 401 , a transmitter 402 , a processor 403 and a memory 404 .

[0128] Receiver 401, used for receiving instructions and data;

[0129] A transmitter 402, used for sending instructions and data;

[0130] Memory 404, for storing computer-executable instructions;

[0131] The processor 403 is used to execute the computer-executable instructions stored in the memory 404 to implement the various steps performed by the motor control method in the above embodiment. For details, please refer to the relevant description in the above motor control method embodiment.

[0132] Optionally, the memory 404 may be independent or integrated with the processor 403 .

[0133] When the memory 404 is independently provided, the electronic device further includes a bus for connecting the memory 404 and the processor 403 .

[0134] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the motor control method executed by the above-mentioned motor control device is implemented.

[0135] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0136] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application 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 replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor control system, characterized in that: The motor control system comprises: a first thyristor, a second thyristor, a forward AC contactor, a reverse AC contactor and a motor; The first thyristor is connected to the forward AC contactor circuit, the first thyristor is used to control the opening and closing of the forward AC contactor, and the forward AC contactor is used to control the rotation direction of the motor; The second thyristor is connected to the reversing AC contactor circuit, the second thyristor is used to control the opening and closing of the reversing AC contactor, and the reversing AC contactor is used to control the rotation direction of the motor; The motor is respectively connected to the forward AC contactor and the reverse AC contactor circuits.

2. The motor control system according to claim 1, characterized in that: The forward AC contactor comprises: a first coil, a first normally closed contact and a first contact module, and the reverse AC contactor comprises: a second coil, a second normally closed contact and a second contact module; The first coil is connected to the first thyristor and the second normally closed contact respectively, and the first coil is used to control the opening and closing of the first contact module; The second coil is connected to the second thyristor and the first normally closed contact respectively, the second coil is used to control the opening and closing of the second contact module, and the first normally closed contact is connected in parallel with the second normally closed contact; The motor is connected to the first contact module and the second contact module respectively.

3. The motor control system according to claim 2, characterized in that: include: When the first thyristor controls the forward AC contactor to be in an open state, the first normally closed contact is in an open state, and the rotation direction of the motor is forward; When the second thyristor controls the reversing AC contactor to be in an open state, the second normally closed contact is in an open state, and the rotation direction of the motor is reverse.

4. The motor control system according to claim 2, characterized in that: The motor control system also includes: a motor thermostat and a detection point; One end of the motor thermostat is connected to a power source, and the other end of the motor thermostat is connected to one end of the detection point, and the motor thermostat is used to detect whether the temperature of the motor is abnormal; The other end of the detection point is connected to the first normally closed contact and the second normally closed contact respectively, and the detection point is used to detect whether the corresponding switch of the motor thermostat is disconnected.

5. A motor control method, characterized in that: Applied to the motor control system according to any one of claims 1 to 4, the method comprises: Acquire the operating parameters of the motor, and determine the rotation direction of the motor according to the operating parameters, wherein the rotation direction includes: forward rotation and reverse rotation; If the rotation direction is forward, the forward AC contactor is controlled by the first thyristor to be in a closed state, so that the motor rotates in the forward direction; If the rotation direction is reverse, the reverse AC contactor is controlled by the second thyristor to be in a closed state, so that the motor rotates in the reverse direction.

6. The method according to claim 5, characterized in that The method of controlling the forward AC contactor to be in an open state by using the first thyristor comprises: Controlling the first normally closed contact in the forward AC contactor to be in an open state by the first thyristor; The method of controlling the reverse AC contactor to be in an open state by the second thyristor comprises: The second normally closed contact in the reversing AC contactor is controlled by the second thyristor to be in an open state.

7. The method according to claim 5, characterized in that The method further comprises: When the motor is in a running state, obtaining a motor temperature of the motor; Determining whether the motor temperature is within a preset temperature range; If yes, determine that the motor is currently in a normal state, and control the motor to continue rotating in the rotation direction; If not, it is determined that the motor is currently in an abnormal state, and the motor is controlled to stop rotating.

8. A motor control device, characterized in that: include: An acquisition module is used to acquire the operating parameters of the motor; A determination module, used to determine the rotation direction of the motor according to the operating parameters, wherein the rotation direction includes: forward rotation and reverse rotation; A control module, for controlling the forward AC contactor to be in an open state through a first thyristor if the rotation direction is forward, so that the motor rotates in the forward direction; The control module is used to control the reverse AC contactor to be in an open state through the second thyristor if the rotation direction is reverse, so that the motor rotates in the reverse direction.

9. A motor control device, characterized in that: include: Memory; processor; Wherein, the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the motor control method according to any one of claims 5 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer execution instructions, which, when executed by a processor, are used to implement the motor control method according to any one of claims 5 to 7.

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