234results about "Stopper details" patented technology

Provided is an electric drum brake system, including: an electric drum brake configured to be driven by an electric motor; a current sensor configured to detect a current input to the electric motor; and a controller configured to, when parking is released, determine a parking release time based on a temperature of the electric drum brake, and when a maintenance time reaches the determined parking release time, end a parking release operation by stopping the electric motor, the maintenance time being a period of time while a state where a motor current detected by the current sensor reaches a target current is maintained.

A torque command calculation unit calculates a torque command value for a motor based on a required braking force commanded from an external source. A relationship between a motor torque and braking forces generated in the electric brakes has a hysteresis characteristic. When the torque increases, the braking force increases along a positive efficiency line, and when the torque decreases, the braking force decreases along an inverse efficiency line. A specific controller calculates a torque command value to bring an actual load closer to a load command value or to bring an actual position closer to a position command value. A control adjuster adjusts a parameter of a control calculation of the specific controller, or a parameter of a control calculation on an input side or on output side of the specific controller during increase operation, during decrease operation, or during transition between the increase operation and the decrease operation.

The invention discloses an intelligent start-stop control method and system for a magnetic suspension refrigeration compressor, and the method comprises the steps: obtaining a position perception enhancement source through collecting and analyzing the current response data of a magnetic bearing coil, and extracting the current response change characteristics; rotor position estimation is carried out based on current response change characteristics, a positioning precision driving source is extracted from estimation deviation, and a non-impact starting excitation current instruction is generated; a multi-sensor fusion data network is established, configuration is reconstructed through an abnormal response activation signal, and a degradation operation fault-tolerant mode is formed; converting a response preparation gain according to the shutdown instruction signal, performing shutdown state evaluation in combination with signal reconstruction configuration, and generating an emergency shutdown trigger condition; and the power supply state of a bus capacitor is detected, gradient control potential is released, the active damping control opportunity is determined, a damping force control instruction is generated, finally intelligent start-stop control over the magnetic suspension refrigeration compressor is achieved, and safe and reliable operation of the system under various working conditions is ensured.

The invention provides a braking rotating device with a power generation function, a self-powered rotating system, a control method and a wire cup, and the braking rotating device comprises a stator part which comprises three groups of coils arranged at intervals in the circumferential direction; the rotor part rotates coaxially with the stator part and comprises a plurality of magnets which are arranged at intervals in the circumferential direction and have alternately changed polarities; the self-power-generation brake part generates power based on rotation of the rotor part relative to the stator part and performs brake control on the rotor part based on a received brake signal, the self-power-generation brake part comprises a three-phase rectifier bridge circuit, and three phase current ends of the three-phase rectifier bridge circuit are respectively connected with the three groups of coils; at least one phase of the three-phase rectifier bridge circuit is provided with a switching device, at least one phase of the three-phase rectifier bridge circuit is not provided with a switching device, and when an enabling end of the switching device receives a brake signal, a phase current end of the phase where the switching device is located and a common anode or a common cathode of the three-phase rectifier bridge circuit are conducted.

An example aircraft includes a parallel propulsion unit, the parallel propulsion unit comprising: a propulsor configured to provide forward propulsion of the aircraft; a gas turbine engine configured to drive the propulsor; an electrical machine configured to generate, for output via one or more electrical busses, electrical energy using mechanical energy derived from the gas turbine engine; and a power sharing module configured to control a ratio of the mechanical energy used to drive the propulsor and used to generate electrical energy; and a plurality of series propulsion units, each series propulsion unit comprising a respective propulsor of a plurality of propulsors that are configured to provide vertical propulsion of the aircraft and a respective electrical machine of a plurality of electrical machines, each respective electrical machine configured to drive a respective propulsor of the plurality of propulsors using electrical energy received from one or more electrical busses.

The invention provides a reciprocating tool and a method of controlling an electric motor of the reciprocating tool. One aspect of the present invention relates to a reciprocating tool comprising a reciprocating member, an electric motor, a transmission device, a control circuit, a drive circuit, a position detector, and a signal cut-off circuit. The drive circuit (i) receives at least one drive signal, and (ii) drives the electric motor in accordance with the received at least one drive signal. The position detector outputs a position detection signal whenever the reciprocating member reaches a predetermined position during at least one reciprocating operation. The signal cut-off circuit cuts off at least one drive signal for the drive circuit in response to the position detector outputting the position detection signal.

The invention relates to the technical field of motor driving control, and discloses a motor driving method with low delay response. The method comprises the steps of collecting real-time operation parameters such as motor speed data, position data and current data, determining a low-delay control model based on the parameters, generating a dynamic adjustment instruction by using the model and applying the dynamic adjustment instruction to a motor driving system, and executing feedback calibration operation according to motor response data so as to update the model. Parameters are collected in real time, and an adaptive control model is constructed, so that a control instruction can be changed along with the running state of the motor, and the lag of an intermediate link is reduced; the dynamic adjustment instruction directly acts on the driving system, and the response speed is increased; the feedback calibration criterion compensates performance drift through continuously optimizing the model, and ensures that the motor keeps stable dynamic performance under different working conditions. The method can enhance the response capability of the motor in the scenes of load sudden change, speed switching and the like, improve the synchronism of multi-motor cooperation, reduce mechanical wear, and is suitable for various motor types and application scenes.

The present disclosure relates to an electronic parking brake system and a control method thereof. The electronic parking brake system includes an electronic parking brake that includes an electronic parking brake actuator applied by a motor. The electronic parking brake system includes a current sensor configured to detect a current flowing in the motor. The electronic parking brake system includes a processor configured to control a parking apply operation of the electronic parking brake. The electronic parking brake system includes a memory configured to store an inrush current generated during the parking apply operation of the electronic parking brake in a no-load condition. The processor calculates an inrush current model based on the inrush current and may accurately estimate and remove the inrush current generated during the parking apply operation by modeling the inrush current when there is no external load.

The utility model discloses an anti-lock brake circuit capable of reducing mechanical shock of a servo motor, which comprises a direct-current power supply, a relay, a diode and a brake coil, the anode of the direct-current power supply is connected with the anode of the diode through the relay, the cathode of the diode is connected with one end of the brake coil, and the cathode of the direct-current power supply is connected with the other end of the brake coil; an oscillating circuit formed by connecting a resistor and a capacitor in series is connected with the brake coil in parallel, and the resistor is connected with the cathode of the diode. The utility model not only can solve the problems of'mechanical impact 'and'flexible braking' frequently occurring in emergency, but also can reduce the braking burden, prolong the service life of equipment and improve the precision of the equipment.

A brake control device for controlling a brake device of the non-excitation-actuated type includes: a power supply; a brake control unit outputting a brake control signal; an opening / closing unit opening and closing a circuit between the power supply and brake device according to the brake control signal; a state detection unit outputting a state detection signal indicating an electric potential state of a circuit between the opening / closing unit and the brake device; an abnormality detection unit detecting whether an abnormality is absent or present based on a content of the brake control signal and a content of the state detection signal; a brake lock switch connected between input terminals of the brake device to be connected in parallel with the brake device; and a brake lock switch control unit closing the brake lock switch when the abnormality is detected by the abnormality detection unit.

A motor drive circuit comprising: a first motor (111) and a second motor (112) for releasing or actuating a parking brake applied to different wheels (101, 103, 105, 107); and a first ECU (10) and a second ECU (20) for controlling the drive of the first motor (111) and the second motor (112), respectively, wherein the second ECU (20) is prevented from interfering with the drive of the first motor (111) and the second motor (112), while the first ECU (10) drives the first motor (111) and the second motor (112), and controls the drive of the first motor (111) and the second motor (112) only when an anomaly is present in the first ECU (10), and the first ECU (10) has the following features: a first MCU (11) for confirming a release or actuation state of an electronic parking brake; a first control device (12) for outputting a switching control signal according to the control of the first MCU (11); a first power supply device (13) which is switched according to a switching control signal from the first control device (12) to change the direction of a current and to supply the first motor (111) and the second motor (112) with the current respectively; and a first selection device (15) for selectively supplying the first motor (111) and the second motor (112) with the current from the first power supply device (13), or for controlling the supply of the first power supply device (13) with a current from a battery (BAT).

The utility model discloses a permanent magnet brake fixing assembly for a servo motor, which relates to the technical field of servo motors and comprises a shell and a connecting assembly, a motor shell is arranged outside the shell, a rotating sleeve is rotatably connected in the shell, the connecting assembly is arranged in the rotating sleeve, and the motor shell is connected with the connecting assembly. And the connecting assembly comprises a limiting groove, a limiting block, a limiting sleeve, a connecting groove and a baffle ring, the limiting groove is formed in the rotating sleeve, and the limiting block is slidably connected into the limiting groove. According to the permanent magnet brake fixing assembly for the servo motor, through the arrangement of the connecting assembly, when the permanent magnet brake fixing assembly is connected with rotor shafts of different shapes, blocking on a limiting block can be relieved only by unscrewing a baffle ring and detaching the baffle ring from a rotating sleeve, so that an internal limiting sleeve is conveniently detached and replaced, and after the interior of a connecting groove of a corresponding shape is replaced, the limiting sleeve can be conveniently detached and replaced. After the baffle ring is installed on the rotating sleeve again, the limiting block can be positioned, and then the motor shaft can be quickly connected only by sleeving the limiting sleeve on the motor shaft.

The application provides a motor braking device, which comprises a frame, a first solenoid for controlling the forward rotation of the motor and a second solenoid for controlling the reverse rotation of the motor are arranged in the frame respectively; the first solenoid and the second solenoid each comprise a coil, a moving iron core and a static iron core, the static iron core is sleeved on one end of the moving iron core, and the coil is arranged on the outer side of the moving iron core and the static iron core; one end of the moving iron core is arranged outside the static iron core and connected with a first driving element, the other end of the moving iron core is connected with a second driving element, the first driving element is connected with a driving switch, and the second driving element is connected with a limit switch through a third driving element. The two solenoids are arranged to control the forward and reverse rotation of the motor respectively, the coils of the two solenoids are electrified to control the forward and reverse rotation of the motor respectively, and the coils are automatically connected with a standby braking circuit after losing electricity; when a switch SL3 in the electric circuit is actuated, the motor is instantaneously braked, and the braking is rapid and reliable.

The utility model provides a three-station motor control system. The three-station motor control system comprises a power supply module, a station detection module, a main control module, a first driving module, a second driving module and a man-machine interaction module, the power supply module is used for supplying power; the station detection module is used for detecting the station state of the three-station main switch and sending a station detection signal to the main control module; the main control module controls the corresponding action of the motor through the first driving module and controls the corresponding action of the electromagnetic brake through the second driving module according to the station detection signal; the motor is used for driving the three-station main switch to perform station switching; the electromagnetic brake is used for braking the motor; according to the utility model, the station state of the three-station main switch can be detected in real time, so that the main control module can control the motor and the electromagnetic brake to perform corresponding actions, and the station state of the three-station main switch can be displayed.

A braking controller arrangement, a drive system, a vehicle, and a method of control. The braking controller arrangement includes a link circuit, a first semiconductor, a second semiconductor, a third semiconductor, a fourth semiconductor, and a resistor. The link circuit is electrically connected to terminals of a battery. The semiconductors are configured to be operated with a duty cycle of 50%.

To provide a brake control circuit that can eliminate a time lag from the start of power supply to the start of voltage application to a coil of a non-excitation actuated electromagnetic brake even though it is possible to reduce the power consumption when the electromagnetic brake is in the released state.SOLUTION: When power supply to a brake control circuit 4 is started, the brake control circuit 4 applies, to a coil 3, a first voltage which is a DC voltage that releases an electromagnetic brake and is an input voltage to the brake control circuit 4 for a predetermined time, and then applies, to the coil 3, a second voltage which is a DC voltage that maintains the released state of the electromagnetic brake, and starts the application of the first voltage to the coil 3 in synchronization with the start of power supply. Further, the brake control circuit 4 stops a first drive signal for generating the first voltage when a predetermined time elapses after the start of power supply, and starts to generate a second drive signal to generate the second voltage before the first drive signal is stopped.SELECTED DRAWING: Figure 4

To provide an electric brake device which requires no prior measurement, supports a change over time, and is capable of calculating a thrust conversion ratio with respect to current, regardless of a mechanical structure.SOLUTION: An electric brake device includes: an electric motor 8; a piston 6 moving as the electric motor 8 rotates; brake pads 5a, 5b pressing a disc rotor 2 by thrust generated by movements of the piston 6; and a motor control device 11 for controlling rotation of the electric motor 8. The motor control device 11 is provided with an efficiency estimation unit 35 which estimates relations between current to be supplied to the electric motor 8 and the thrust on the basis of an increase in current value of the electric motor 8 with respect to an increase in position of the piston 6 and the current value of the electric motor 8.SELECTED DRAWING: Figure 2

The invention relates to an extensible architecture for safe torque shutdown and safe brake control. A control system for a safe torque off (STO) operation and a safe brake control (SBC) operation is provided. The control system includes a motor; a brake; and a Driver Secure Interface Board (DSIB), the Driver Secure Interface Board (DSIB) comprising: a first portion of a first circuit for completing the STO operation; a first portion of a second circuit for completing the SBC operation; and a monitoring circuit for monitoring the STO operation and the SBC operation.

It is an object of the present invention to provide an electric brake device capable of accurate control at low cost. The present invention includes a motor control device 11 that controls rotation of an electric motor 8 for pressing brake pads 5a, 5b. The motor control device 11 is provided with: a motor position-current relationship generation portion 43 that acquires a relationship between the rotational position and the current of the electric motor 8; a braking torque estimation portion 41 that estimates braking torque pressing the brake pads 5a, 5b, on the rotational position of the electric motor 8; and a braking torque-position relationship portion generation portion 42 that acquires a relationship between the rotational position and the braking torque of the electric motor 8 on the basis of information from the motor position-current relationship generation portion 43 and the braking torque estimation portion 41. The rotation of the electric motor 8 is controlled on the basis of information from the braking torque-position relationship portion generation portion 42.

The present invention discloses a series-excited motor control circuit and method, belonging to the field of motor control technology. The control circuit includes a control circuit, which includes a drive circuit and a brake circuit. The control circuit includes a power supply, a switch group, an armature, an excitation winding, and a brake resistor. The armature and excitation winding constitute a motor. The switch group includes switches KV1, KV2, KV3, KV4, KV5, and KV6. The armature includes terminals ZH1 and ZH2. The excitation winding includes terminals D3 and D4. The brake resistor includes terminals RX1 and RX2. The upper end of switch KV1 is connected to the upper end of switch KV2, and both are connected to the positive pole of the power supply. The present invention actively controls the rapid switching of the power tube conduction state during the braking phase, reversely connecting the excitation winding to the brake circuit, and forming energy-consuming braking. This reduces the impact of inertial shock caused by excessive motor speed and improves the stability of the entire control system.

Systems and methods of optimizing electric motor shutdown timing are disclosed. One system includes a machine comprising an electric motor, at least one processor, and at least one memory. The electric motor is configured to automatically shut off after a first time period. The memory stores instructions that, when executed by the processor, cause the system to determine a value pattern based on one or more parameters of the machine and / or one or more parameters of the electric motor, generate a second time period based on the value pattern, and automatically shut off the electric motor based on the second time period. In some embodiments, the value pattern is based on one or more parameters of a user profile associated with an operator of the machine.

The invention discloses a rectifying circuit device of an electromagnetic power-off brake, and relates to the technical field of rectifiers. The rectifying circuit device of the electromagnetic power-off brake comprises an external component; the alternating current circuit assembly is arranged in the external assembly and is used for converting alternating current into direct current; the direct current circuit assembly is arranged in the external assembly and is used for adjusting the voltage of the direct current; and the relay assembly is arranged in the external assembly. The operation stability of the rectification circuit device is improved.

The invention provides an electromagnetic brake control device which further controls an electromagnetic brake without delay. An electromagnetic brake control device (55), which controls an electromagnetic brake (54) that brakes the rotation of an AC motor (53) when the energization of an electromagnetic brake coil (54a) is cut off, is provided with: a rectifier (81), the DC side of which is connected to the electromagnetic brake coil (54a); a switching unit (84) that controls the power to the electromagnetic brake coil (54a) by switching a rectifier circuit (RL) connecting the rectifier (81) and the electromagnetic brake coil (54a) on and off; a DC converter (82) that is connected to the motor drive AC circuit (51a) and converts AC power to a predetermined DC voltage; an electromagnetic brake release circuit unit (85) that switches the switching unit (84) to an ON state by means of the DC voltage generated by the DC converter (82); and an electromagnetic brake operation command unit (83) that switches the switching unit (84) to the OFF state when the value of the current waveform of the AC motor (53) is between a positive threshold value and a negative threshold value and lasts for a predetermined determination time or longer.

A control apparatus for a conveying system includes: a control module configured to control a power converter coupled to a motor; and a modification module. The modification module is configured to: estimate a size parameter of an item conveyed by the motor; determine if a hold command is received; and if a hold command is received, modify one or more parameters of the control module based on the estimated size parameter of the item to thereby hold a rotor of the motor at a rotor hold position.

The invention relates to a drive system (1) comprising a frequency converter (2), at least one drive unit (3), and a power supply (4), wherein the drive unit (3) has an electric motor (M) and at least one further component (36) consisting of at least one sensor element, actuator element and / or data storage element, and wherein the frequency converter (2) supplies the further component (36) of the drive unit (3) with energy via at least the one power supply (4), wherein the frequency converter (2) is designed to obtain a first piece of information (41) about the maximum available electrical energy of the power supply (4), wherein the frequency converter (2) is designed to obtain a second piece of information (31) about the electrical energy requirement of the further component of the drive unit (3), wherein the frequency converter (2) is designed to check the plausibility of the first piece of information (41) with respect to the second piece of information (31), wherein the decision-making criterion for the plausibility check is formed by a logical comparison of the first piece of information (41) with the second piece of information (31), and wherein the frequency converter (2) is designed to adapt the system state of the drive system (1) in accordance with the result of this plausibility check.

The application discloses an intelligent start-stop control method and system for a magnetic suspension refrigeration compressor, which acquires a position perception enhancement source and extracts current response change characteristics by collecting and analyzing current response data of a magnetic bearing coil; estimates a rotor position based on the current response change characteristics, extracts a positioning accuracy driving source from an estimated deviation, and generates a non-impact start-up excitation current instruction; establishes a multi-sensor fusion data network, activates a signal reconstruction configuration through an abnormal response, forms a degraded operation fault-tolerant mode; converts a response preparation gain according to a shutdown instruction signal, evaluates a shutdown state in combination with the signal reconstruction configuration, and generates an emergency shutdown trigger condition; detects a bus capacitor power supply state, releases gradient control potential, determines an active damping control opportunity, and generates a damping force control instruction, so as to finally realize intelligent start-stop control of the magnetic suspension refrigeration compressor, and ensure safe and reliable operation of the system under various working conditions.

To provide a technique capable of suppressing delay in halt operation of an electric motor in a reciprocating tool.SOLUTION: A reciprocating tool includes a reciprocating member, an electric motor, a transmission device, a control circuit, a drive circuit, a position sensor and a signal interruption circuit. The drive circuit (i) receives at least one drive signal, and (ii) drives the electric motor in accordance with at least one drive signal that is received. The position sensor outputs a position detection signal every time the reciprocating member reaches a prescribed position in at least one reciprocating operation. The signal interruption circuit has a wired logic so constituted as to block at least one drive signal from the drive circuit in response to the output of the position detection signal by the position sensor.SELECTED DRAWING: Figure 6

The invention discloses a cascade type high-voltage frequency conversion system load braking system and a braking method. The cascade type high-voltage frequency conversion system load braking system comprises a braking control panel, a braking resistor interface of the braking control panel is connected with a braking resistor, positive and negative busbar interfaces of a terminal of the braking control panel are connected with a direct-current bus of a frequency converter power module, and a power input interface of the braking control panel is connected with a 15V power supply. According to the braking circuit, the problem of control lag caused by a strategy of sacrificing speed response in order to restrain bus rising in an existing method is solved.

The invention relates to a spring-return actuator (SA) comprising an electric motor (MO) and a downstream gearbox (G), wherein a permanent-magnetic detent-torque restraint is effective between the stator (ST) and the rotor (RO) of the electric motor. The latter is dimensioned in such a way that, owing to the effective detent-torque restraint, an output-side actuating element (Z) remains in the actuating position in a current-free state after it has been moved from a rest position (RP) into an actuating position (BP) and after the motor-side torque has subsequently been removed by a motor control unit (MS). The motor control unit is designed, in the event of a fault or triggering situation, to actuate the electric motor with a torque pulse in the direction of rotation back towards the rest position in order to release the electric motor from the current-free actuating position of the actuating element. The actuator comprises a device (DG, H) for detecting a rotational position of the electric motor. If a change is detected in the rotational position in a direction of rotation back towards the rest position, the electric motor is actuated in order to apply a torque in the opposite direction of rotation so as to move the actuating element back into the (current-free) actuating position.

This application provides a control method and a related device for a drive motor of an automobile, and a transmission gearbox of an automobile. A stator of the drive motor includes a first phase winding, a second phase winding, and a third phase winding. The method includes: obtaining a position of a rotor of the drive motor, where the first phase winding is connected in parallel to the second phase winding, the first phase winding is connected in series to the third phase winding, and the second phase winding is connected in series to the third phase winding; and the drive motor is in a boost charging mode, and is configured to charge a power battery of the automobile after boosting a charging voltage; and if the position of the rotor is not a first target position, supplying a first current to the drive motor, so that a magnetic field generated by the stator adjusts the position of the rotor to the first target position, to make a locked-rotor torque of the drive motor be zero. In this embodiment of this application, the locked-rotor torque of the drive motor can be released.