61results about "Ac motor stoppers" patented technology

The invention discloses a control method and device of a braking device and the braking device, which are used for reducing the cost of a braking assembly of a multi-level inverter. The braking device comprises a first braking assembly, a second braking assembly and at least one third braking assembly. The first brake assembly, the at least one third brake assembly and the second brake assembly are connected in series; the first brake assembly is connected with a first bus capacitor in the inverter in parallel, the second brake assembly is connected with the last bus capacitor in the inverter in parallel, and each third brake assembly is connected with two bus capacitors in the inverter in parallel; the first brake assembly and the second brake assembly comprise bridge arms, the upper bridge arm of the first brake assembly and the lower bridge arm of the second brake assembly are diodes, and the diodes are connected with a brake resistor in parallel; each third brake assembly comprises a first bridge arm and a second bridge arm which are connected in series, a lower bridge arm of the first bridge arm and an upper bridge arm of the second bridge arm are diodes, and at least one brake resistor is connected between the lower bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm in parallel.

A startup control circuit includes a direct current (DC) conversion circuit, a main control unit, a first switch circuit and a second switch circuit. The first switch circuit is connected to the battery pack and the DC conversion circuit. The second switch circuit is connected to a battery pack, the DC conversion circuit, and a main control unit. The first switch circuit is configured to activate the DC conversion circuit to supply power to the second switch circuit and the main control unit after the first switch circuit is triggered. The second switch circuit outputs different voltage waveforms based on different timing sequences of currents flowing from the battery pack and the DC conversion circuit to the second switch circuit. The main control unit is configured to output a first drive command when receiving a first voltage waveform.

Provided are a method and a device for controlling a braking device, and a braking device, with which cost of a braking component of a multi-level inverter is reduced. The braking device includes a first braking component, a second braking component, and at least one third braking component. The first braking component, the at least one third braking component and the second braking component are connected in series. The first braking component is connected in parallel to a first bus capacitor in the inverter, the second braking component is connected in parallel to the last bus capacitor in the inverter, and each third braking component is connected in parallel to two bus capacitors in the inverter. The first braking component and the second braking component include a bridge arm. An upper bridge arm of the first braking component is a diode, a lower bridge arm of the second braking component is a diode, and braking resistors are connected in parallel to the diodes. Each third braking component includes a first bridge arm and a second bridge arm connected in series. A lower bridge arm of the first bridge arm is a diode, an upper bridge arm of the second bridge arm is a diode, and at least one braking resistor is connected in parallel between the lower bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm.

This invention relates to a method for operating a modular brake regulator (1), wherein the modular brake regulator (1) has at least two brake regulator branches (15), each of which has at least one submodule (2) and a brake resistor (3); wherein the brake regulator branches (15) are arranged in a parallel circuit, and wherein at least two of the brake regulator branches (15) generate an alternating component (u) by means of the corresponding at least one submodule (2). BR,aDC voltage (u) BR ), wherein the alternating component (u) of each brake regulator branch (15) BR,aDC The phase offset between them, where n corresponds to the number of the braking regulator branches (15) that generate the voltage; where all alternating components (u BR,aDC The amplitudes are the same, and it is designed to convert the electrical energy absorbed by the modular brake regulator (1) over time into heat in the brake resistor (3). Furthermore, the invention relates to a control device (10) configured to perform such a method. The invention also relates to a modular brake regulator (1) having such a control device, and a modular drive unit (20) having a modular multilevel converter (21) and such a modular brake regulator (1).

This invention discloses a forward / reverse control module based on zero-crossing detection control, comprising a power supply circuit, an interlock delay circuit, a drive circuit, a switching circuit, a detection circuit, and a control unit. The drive circuit is connected in series between the interlock delay circuit and the switching circuit, and the switching circuit is connected in series between the load power supply and the winding terminals of the motor. The signal input terminal of the detection circuit is connected to the switching circuit. The control unit is connected to the interlock delay circuit to detect the presence of a forward rotation signal and / or a reverse rotation signal. The control unit is connected to the drive circuit through the detection circuit, and outputs a braking signal to the drive circuit. The drive circuit drives the corresponding switch in the switching circuit to conduct according to the braking signal, thereby realizing forward / reverse control and braking control of the motor. This invention combines forward / reverse control and braking functions without the need for additional braking components. It allows for adjustment of braking time and force, and features a simple braking structure, excellent performance, and high reliability.

A controller for controlling an electric machine used to propel and / or brake an electric vehicle. The controller is configured to obtain an indication of a desire to use the electric machine to brake the vehicle and, in response to obtaining the indication, and as part of controlling the electric machine, intentionally increase core magnetization losses in the electric machine. Provided is also a laminated stator and / or rotor for an electric machine, wherein an insulation material of the stator and / or rotor is selected to have an electric conductivity that increases with frequency. A corresponding vehicle, method, computer program (product) and computer-readable storage medium are also provided.

The invention relates to a method for controlling an electric machine, the method comprising the following steps: detecting a predetermined operating state of the electric machine while performing traction control of the electric machine; performing transition control and / or monitoring upon detection of the predetermined operating state in order to subsequently switch an active short circuit of the electric machine, comprising the following steps: generating steady-state target current values ​​to produce an active short circuit based on current input variables of the electric machine; performing rate limiting to limit the maximum rate of change of the target current values;Implementation of a feedforward control process in which the target current values ​​output by the rate limiter are converted into target voltage values, which contain at least one component from a time-dependent change in the magnetic flux of the electric machine, and output for controlling the electric machine; switching the active short circuit of the electric machine. Furthermore, the invention relates to a corresponding control device, a corresponding computer program and a corresponding storage medium.

A motor driving device includes a direct current (DC) link capacitor configured to store DC power, and an inverter configured to convert the DC power stored in the DC link capacitor into AC power and supply the AC power to a motor. The motor driving device includes a shunt resistor configured to sense current flowing through the inverter and detect whether the current has reached threshold current for controlling a regenerative voltage during a braking operation. A control unit is configured to control an operation of the inverter and perform a regenerative operation when the braking operation is started. The control unit, during the regenerative operation, switches motive power of a drum connected to the motor into regenerative energy and transmit the regenerative energy to the DC link capacitor, by controlling active component current and reactive component current together in response to the reaching of the threshold current.

A system with a synchronous linear motor and a method for operating a system, wherein a mobile unit is movably arranged along a conveyor line and stator windings of the synchronous linear motor are arranged along the conveyor line, wherein the mobile unit has a permanent magnet arrangement whose permanent magnets are in operative connection with the stator windings, wherein the respective stator winding is electrically supplied from the AC-side connection of a respective inverter, wherein the DC-side connections of the inverters are connected in parallel to each other and to a first series circuit, which consists of a resistor R and two first controllable switches, wherein a second series circuit can be connected in parallel to the series circuit, which has at least one energy storage device and one controllable switch.

A medical system may include a motor of a robotic component, a driver circuit coupled to the motor, and a shunting circuit coupled to the driver circuit. The shunting circuit may be configured to shunt the driver circuit for a set amount of time to stop the motor. The shunting circuit may include a capacitor (C) and a first resistor (R), the capacitor and first resistor having an RC time constant, where the set amount of time corresponds to the RC time constant. Methods for operating a shunting circuit are also disclosed herein.

A device for the regulation of devices which can be regulated with a 0-10 Vdc and / or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.

Disclosed in the present application are a protection circuit, a protection control method for an electric drive system, an electric drive system and a vehicle. The protection circuit comprises a sampling module and a control module, the sampling module being used for obtaining a plurality of sampling signals of an electric drive system, and the control module being connected to the sampling module and being used for executing a protection measure for the electric drive system when at least two of the plurality of sampling signals of the electric drive system are abnormal. The protection circuit can acquire a plurality of signals for comprehensive processing; since the signal processing is all performed within the control module, there is no need for an additional external signal processing circuit, thereby optimizing the overall structure; in addition, by taking a plurality of different types of sampling signals into consideration, it can be comprehensively determined whether to protect an electric drive system, thereby improving safety and reliability and avoiding misjudgment caused by abnormal sampling or damage of sampling modules.

A method for operating a power tool includes electronically braking a motor shaft of a brushless electric motor using a controller of the power tool. A spindle unit, positioned on the motor shaft, has a known rotational position relative to at least one pole of a plurality of poles of a rotor of the motor shaft. The method further includes stopping the motor shaft, using the controller, in a predetermined rotational position relative to a stator of the electric motor based on a detected position state of a plurality of position states as detected by a plurality of position sensors of the electric motor. The plurality of position states identify a rotational position of the rotor relative to the stator, and at the predetermined rotational position, a spindle lock of the power tool is configured to engage the spindle unit without additional rotation of the motor shaft.

A motor control device includes a drive unit including three or more half bridges for driving a brushless motor; a separation switch that opens to cut off current flowing in at least a regenerative direction between the drive unit and a power source; and a control unit executing, when an event that requires the brushless motor to be turned off is detected: a step of setting a drive output of at least some of the three or more half bridges to ground level or turning off the at least some of the three or more half bridges; a step of opening the separation switch; and a step of turning off a drive output of the remaining half bridges of the three or more half bridges whose drive outputs are not turned off during a period when power flowing to a coil included in the brushless motor is positive or zero.

A drive system for an aircraft. The drive system includes a controller, a motor coupled to an H-bridge network, a DC link that can be coupled to the motor; and an electrical braking system (100) configured to be electrically coupled to the motor. The electrical braking system includes: a sense circuit configured to sense a condition of the DC link; a brake resistor coupled to the DC link; a temperature sensor; a drive circuit coupled to the sense circuit; and a coil for breaking in an inductive braking mode or generating heat in a cold start mode, wherein the coil is located in or near a line replaceable unit chassis that includes printed circuit boards.

A control circuit and method for DC motors is disclosed in the present application. The control circuit may comprise a voltage monitoring unit for monitoring the output voltage of the DC power supply, a switching circuit for controlling the operation of the DC motor, and a PWM signal output unit to output PWM signal for controlling the switching circuit. The PWM signal output unit may be configured to regulate the duty cycle of the output PWM signal based on the results of the voltage monitoring unit. In this way, motors with different resistances may work continuously in a stabilized state. Also, it may detect when a load like motor is heavy loaded or overloaded, stop motor from starting, and avoid overtime working due to the drop of supply voltage damaging the load like motor. When the voltage of power supply is higher than the rated voltage of the motor, it may regulate the input voltage value of power supply to avoid the increase of excitation current of motor with the increase of the applied voltage, thereby avoid the loss of iron core.

The application provides a motor identification method based on a battery management module, a motor identification system and a dust collector. The motor identification method based on the battery management module comprises but is not limited to the following steps: in the starting process of the motor, the battery management module controls the opening of a MOS tube, wherein the MOS tube controls the on-off of the starting current of the motor; when the MOS tube is opened and before the motor starts to rotate, an analog-to-digital converter built in the battery management module is used to collect the starting current flowing through the MOS tube; the battery management module collects the power supply voltage of the motor; according to the collected starting current and power supply voltage, the characteristic constant of the motor is determined; and according to the characteristic constant, the model of the motor is determined.

A mechanical system (1) comprising an electric machine (2) and a plurality of half bridges (3) for controlling the electric machine (2), wherein the electric machine (2) has a stator winding (4) including two winding sections (4.1, 4.2), each having a winding strand (14) and a winding connection (10), the winding connection (10) of one winding section (4.1) being electrically connected to a phase connection (8) of a first group (13.1) of half bridges (3), and the winding connection (10) of the other winding section (4.2) being electrically connected to a phase connection (8) of a second group (13.1) of half bridges (3). a mechanical system (1) in which the phase connections (8) of the first group (13.1) of half bridges (3) are electrically connected to the phase connections (8) of the second group (13.2) of the half bridges (3), and each of the phase connections (8) of the first group (13.1) of half bridges (3) is electrically connectable to one of the phase connections (8) of the second group (13.2) of half bridges (3) via bridge connections (11) in order to electrically connect two winding connections (10) of different winding sections (4.1, 4.2), each bridge connection (11) being provided with a switchable switching device (12); the half-bridge (3) of the mechanical system (1) is a control half-bridge, each winding strand (14) of one of the two winding sections (4.1, 4.2) forms a strand pair (15) with one of the winding strands (14) of the other winding section (4.1, 4.2), the winding strands (14) of each strand pair (15) being 180 degrees out of phase with each other; Each bridge connection (11) is characterized in that it is switchable to conduct both current directions by a respective switching device (12).

A protection apparatus for a driver. The protection apparatus includes a detection unit(10), a loop unit(20), and a control unit(30). The detection unit(10) is configured to detect a current flowing through an inverter unit(54). The loop unit(20) is configured to connect a positive terminal to a negative terminal of a DC bus or disconnect the positive terminal from the negative terminal of the DC bus. The control unit(30) is configured to, in response to power on of the driver, control the loop unit(20) to connect the DC bus, and determine, based on a detection result of the detection unit(10), whether a three-phase AC power is connected to the three-phase motor wiring terminal(55), wherein in the case that a three-phase AC power is connected to the three-phase motor wiring terminal(55), the control unit(30) stops.

The utility model discloses a motor electronic brake protection circuit, motor controller and motor equipment relates to electronic technical field. Control switch module's control end connects brake signal end, and control switch module's input end connects the power switch tube control end of upper bridge arm in motor drive circuit, and control switch module's output end is grounded, the input end of first switch tube module connects brake signal end, and the output end of first switch tube module connects the power switch tube control end of lower bridge arm in motor drive circuit, and first switch tube module from brake signal end to the unidirectional conduction of power switch tube control end of lower bridge arm, the power switch tube control end of every phase electric lower bridge arm in motor drive circuit and the drive signal generation end of corresponding connection between setting a second switch tube, and the unidirectional conduction of second switch tube from the drive signal generation end of connection to the power switch tube control end of connected lower bridge arm. Like this, try to avoid the damage of motor drive circuit and electronic brake function circuit.

The invention relates to a method for braking a rotating brushless DC motor (2) of an electrically driven machining device (1), in particular for achieving a standstill of the DC motor (2), wherein the DC motor (2) can be controlled by means of a bridge circuit (3) of the machining device (1) to perform electronic commutation, - wherein the method comprises: - providing a rotational speed variable (nG) representative of a rotational speed (n) of the DC motor (2), in particular repeatedly, and - braking the rotating DC motor (2) by varying a duty cycle (D) of a pulse-duration modulation (PDM) when controlling the bridge circuit (3), wherein the duty cycle (D) has values between 0 and less than 1, depending on the provided rotational speed variable (nG), if the rotational speed (n) is greater than 0.

To provide a motor control device which prevents heat generation from deviating to a specific phase at the time of lock energization of a polyphase motor.SOLUTION: Motor control devices 351 to 354 include: a torque command calculation part 40 for calculating a torque command value Trq*; a current command value calculation part 50 for calculating a current command value I*; an inverter (power converter) 55; and a stop position adjusting device 67. The stop position adjusting device 67 executes "stop position adjusting processing" of adjusting a rotation stop position within a predetermined position adjusting range, at the time of lock energization of performing energization in a state where rotation of a polyphase motor 60 is stopped, except for a case of satisfying a predetermined application exception requirement. In the stop position adjusting processing, the stop position adjusting device 67 adjusts a rotation stop position so that a current is deviated to high heat dissipation phases of one or more phases having a relatively high heat dissipation property among each phase. The torque command calculation part 40 or the current command calculation part 50 calculates the torque command value Trq* or the current command value I* reflecting the rotation stop position after adjustment.SELECTED DRAWING: Figure 5

This invention relates to a method for operating a modular brake regulator (1), wherein the modular brake regulator (1) includes at least one submodule (2) and a braking resistor (3). To improve this modular brake regulator, it is proposed to generate a rectangular waveform voltage or a trapezoidal waveform voltage (u) using the submodule (2). BR ), where the rectangular waveform voltage or trapezoidal waveform voltage (u BR It has a DC component (u) BR,DC ) and alternating components (u BR,aDC ), where the alternating component (u BR,aDC ) by the upper voltage value (u BR,AC1 ) and lower voltage value (u BR,AC2 The system is configured such that the upper voltage value persists during the first time period (τ1), and the lower voltage value persists during the second time period (τ2). This is achieved by utilizing the DC component (u... BR,DC The power to be converted into heat is controlled or regulated, wherein the power is controlled or regulated by means of the DC component superimposed on it (u). BR,DC Alternating components (u) above BR,aDC The invention also relates to a control device (10) configured to perform such a method. Furthermore, the invention relates to a modular brake regulator (1) with such a control device, and a modular drive unit (20) having a modular multilevel converter (21) and such a modular brake regulator (1).

Title: Method for controlling at least one three-phase motor for a Cartesian robot implementing a safety function and system implementing such a method. The invention relates to a method for controlling at least one three-phase motor, comprising, for the implementation of a safety function, the following steps: - measurement of the supply current of said motor; - analog transformation of said measured current into at least one speed signal; - comparison of the voltage of the speed signal to a reference voltage; and - activation of said braking means of said motor when said voltage of the speed signal is greater than or equal to said reference voltage. Figure for the abstract: Fig. 1

This document provides a system comprising: a resistor grid including a plurality of resistive elements, the resistor grid being electrically coupled to a motor of an electrically driven machine; a temperature sensor arranged to measure the temperature of at least one of the plurality of resistive elements; control circuitry including one or more processors and a memory configured to store instructions that, when executed by the one or more processors, cause the control circuitry to: determine the temperature of at least one resistive element based on the measurement from the temperature sensor; and determine a resistive braking capacity of the resistor grid within a power capacity difference based on the determined temperature of the resistive element; and a display configured to present a graphical representation of the resistive braking capacity of the resistor grid relative to the power capacity difference.

Motor drive device attached to a vehicle with a power machine (1) and a motor (2050) directly coupled to each other, wherein the vehicle comprises a DC power supply device (2002) configured to supply an electric current to the motor (2050) and charged by an output of the motor (2050), wherein the motor drive device comprises: an inverter (2030) configured to convert an electric DC current supplied by the DC power supply device (2002) into an electric AC current, and to convert an electric AC current received from the motor (2050) into an electric DC current;and a control device (2001) configured to control the inverter (2030), wherein the motor (2050) and the inverter (2030) configured to drive the motor (2050) each comprise a first group with a U-phase, a V-phase and a W-phase and a second group with an X-phase, a Y-phase and a Z-phase; wherein the control device (2001) comprises: a fault detection unit configured to determine whether at least the inverter (2030) and / or the DC power supply device (2002) has a fault, in order to determine whether or not current flow from the motor (2050) to the DC power supply device (2002) is blocked;a DC supply state determination unit configured to determine whether or not the DC supply device (2002) is fully charged, in order to determine whether or not current flow from the motor (2050) to the DC supply device (2002) is blocked;and a switching unit configured to select, when determined by the fault detection unit and the DC supply state determination unit that the current flow from the motor (2050) to the DC supply device (2002) is blocked, a control operation performed in the inverter (2030) from an all-phase shutdown and a three-phase short circuit based on a motor rotation speed of the motor (2050), an induced voltage of the motor (2050) and a DC linkage voltage of the motor (2050), wherein in the all-phase shutdown all switching elements (3) of the inverter (2030) are open;and wherein the control device further comprises a three-phase short-circuit processing unit configured to perform control such that, when a reduction amount of the three-phase short-circuit torque is equal to or greater than a threshold value 4 while the inverter (2030) is performing the three-phase short circuit, one of the first group and the second group performs power operation and another of the first group and the second group performs recovery in order to achieve a rise and a fall of the DC current from zero.

A controller (100) for controlling an electric machine (610) used to propel and / or brake an electric vehicle 600. The controller is configured to obtain an indication (110) of a desire to use the electric machine to brake the vehicle and, in response to obtaining the indication, and as part of controlling the electric machine, intentionally increase core magnetization losses in the electric machine. Provided is also a laminated stator and / or rotor for an electric machine, wherein an insulation material of the stator and / or rotor is selected to have an electric conductivity that increases with frequency. A corresponding vehicle, method, computer program (product) and computer-readable storage medium are also provided.

This invention discloses a forward / reverse control module based on power supply polarity control, comprising a power supply circuit, an interlock delay circuit, a drive circuit, a switching circuit, a detection circuit, and an external brake signal input terminal. The drive circuit is connected in series between the interlock delay circuit and the switching circuit, and the switching circuit is connected in series between the load power supply and the winding terminals of the motor. The signal input terminal of the detection circuit is connected to the switching circuit to detect the positive and negative directions of the input voltage of the load power supply. The external brake signal input terminal is connected to the drive circuit through the detection circuit, and an interlock switch is connected between the external brake signal input terminal and the detection circuit. The output terminal of the interlock delay circuit is connected to the interlock switch to control its on / off state. This invention combines forward / reverse control and braking functions without requiring additional braking components, can autonomously adjust the braking time, and features a simple braking structure, excellent braking performance, and high reliability.