698results about "Ac motor stoppers" patented technology

An electric motor based system includes an electric motor; an electric motor power controller for controlling the electric motor; a first control unit, adapted to provide first control signals for the electric motor power controller; an electric power storage device adapted to power the electric motor power controller; a first sensor adapted to determine information related to power exchange between the electric power storage device and the electric motor power controller; and a second control unit, wherein the second control unit is adapted to pass the first control signals, received from the first control unit, to the electric motor power controller in a first mode and adapted to provide second control signals for the electric motor power controller in a second mode; and the second control unit inputs and exploits the information.

The invention relates to the technical field of motor starting control, and discloses a large-current starting method suitable for a direct current motor, and the method comprises the steps: continuously monitoring the temperature data in the starting process of a driving motor through a temperature detection module, and collecting the current data in the starting process through an OCP detection module; collected temperature data and OCP monitoring characteristics are input into the restart logic module in a delayed mode, the restart logic module judges whether restart is conducted or not according to a preset algorithm and generates a first restart instruction or a second restart instruction, and the bridge drive circuit controls the motor to be started and restarted according to the received instruction till the motor is started successfully. By monitoring temperature and current data in real time, damage caused by overheating or overcurrent of the motor can be effectively prevented, the restart period is dynamically adjusted, the success rate of starting of the driving motor is increased, starting failure caused by overcurrent protection or overheating protection is avoided, and the service life of the motor is prolonged. The problem that in the prior art, when a large-capacity direct-current motor is started, current interruption is prone to occurring is solved.

Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

The utility model provides a mechanical arm power-down protection circuit and a sweeping robot, and relates to the technical field of motor control, the mechanical arm power-down protection circuit comprises a power supply module, a micro-control module, a relay and a mechanical arm control module, when the power supply module supplies power, a control end of the relay is electrified to control a common end to be conducted with a second connecting end, and the mechanical arm control module controls the micro-control module. The micro-control module controls the power supply module to be connected with the input end of the motor. When the power supply module is powered off, the control end of the relay is powered off, the common end is connected with the first connecting end, the input end of the motor is connected with the grounding end, and a coil of the motor forms loop current and generates resistance to slow down descending of the mechanical arm. By means of the automatic switching function of the relay, the connection state of the motor is rapidly switched when a power source is cut off, resistance is generated through the physical characteristics of the motor so as to slow down descending of the mechanical arm, the circuit structure is simple, cost is low, large installation space does not need to be occupied, and the circuit can be applied to mechanical arms of various sizes and models; and the method has a relatively wide application range.

A motor drive control device includes: a first input unit to which first current from the power source to the control unit is input; a first output unit that outputs the first current input from the first input unit to the control unit; a shutoff unit that is provided between the first input unit and the first output unit, and switches an output state of the first output unit; a second input unit to which second current from the control unit to the motor is input; a second output unit that outputs the second current input from the second input unit to the motor; and an arithmetic unit that is provided between the second input unit and the second output unit, and calculates a rotation speed of the motor.

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 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.

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.

The electro-mechanical actuator of a wind turbine is configured to be powered from a DC link intermediate circuit. A method for controlling the actuator includes: determining whether a voltage demand and a power demand for operating the electro-mechanical actuator at a specific operating point can be met by an output of a first converter. The first converter is connected to a supply grid and configured to provide a first voltage and a first power to the DC link intermediate circuit; and, when the voltage demand and the power demand cannot be met, triggering a boost mode of a second converter connected between the DC link intermediate circuit and an energy store. The boost mode is triggered to: boost the voltage at the DC link intermediate circuit to a second voltage; and, boost the power supply to the electro-mechanical actuator via the DC link intermediate circuit to a second power.

The invention discloses an active protection control system and method of a motor controller and an electric vehicle. Comprising a phase current frequency detection module, a voltage conversion module, a driving chip, a control module, a high-voltage alternating-current electricity taking module and a power module, the phase current frequency detection module is used for detecting a real-time phase current frequency value of a three-phase winding of the motor in real time; the control module is used for storing a phase current frequency limit value and outputting an enable signal of the voltage conversion module; the high-voltage alternating current power taking module is used for obtaining at least one phase of alternating current in the three-phase alternating current and supplying power to the voltage conversion module; the voltage conversion module is used for receiving the voltage conversion enable signal, starting working, converting at least one phase of alternating current into working voltage required by the power module, and outputting the working voltage to a fault pin of the driving chip and a grid electrode of a driving tube of an upper bridge arm or a lower bridge arm in the power module; the active short-circuit protection of the motor in a galloping or overspeed state is realized, and the overvoltage damage of the motor controller is avoided.

Vehicle drive inverter (I) with a DC voltage connection (GA), an AC voltage connection (WA) and a three-phase bridge (B1 - B3) via which these connections (GA, WA) are connected to one another, wherein the vehicle drive inverter (I) has a phase short-circuit circuit (PKS) and a controller (X) which is connected to the phase short-circuit circuit (PKS) and to the three-phase bridge (B1 - B3) in a driving mode, wherein the controller (X) is configured to temporarily control the three-phase bridge (B1 - B3) to generate a phase short circuit and to control the phase short-circuit circuit (PKS) to generate a phase short circuit, while the controller (X) simultaneously controls the three-phase bridge (B1 - B3) to generate the phase short circuit, wherein phases (P1 - P3) of the AC voltage connection (WA) are connected to one another via the phase short-circuit circuit (PKS).

There is provided a control method of a household appliance (100), the household appliance (100) comprising a motor (120) driven by a driving current, the method comprising the steps of: receiving a stop signal for stopping the motor (120); executing an open brake control for stopping the supply of the drive current to the motor (120) on the basis of receiving the stop signal; estimating an initial motor speed of the motor at the start of the open brake control based on a motor phase current of the motor at the start of the open brake control; determining a start time of short-circuit brake control for applying torque in a direction opposite to a rotation direction of the motor based on the estimated initial motor speed; and executing short-circuit brake control at the determined short-circuit brake control start time.

The invention provides an active short circuit control method and device, a vehicle, a medium and a program product, and relates to the technical field of motor control. The method comprises the following steps: under the condition that the motor controller system needs to execute an active short circuit strategy, obtaining thermal damage evaluation values respectively corresponding to a plurality of execution paths contained in a level inverter in the motor controller system; dynamically determining an execution path meeting a thermal damage risk condition as a target execution path of the active short circuit strategy in the plurality of execution paths according to each thermal damage evaluation value; and controlling the level inverter to execute the active short circuit strategy on the target execution path. According to the method, the thermal damage evaluation values corresponding to the multiple execution paths are acquired in real time, and the target execution path of the active short circuit strategy is dynamically determined based on the thermal damage evaluation values corresponding to the multiple execution paths, so that the thermal damage of the power device caused by executing the active short circuit strategy for a long time by a single execution path is reduced; therefore, the thermal damage risk of each power device is obviously reduced.

A robot system includes a motor provided at a joint, a regenerative resistor that consumes a back electromotive force generated by rotation of the motor as heat, and a controller configured or programmed to predict a life of the regenerative resistor based on a period of time during which the regenerative resistor is consuming heat.

Systems, method, and computer readable medium are provided for producing a DC output, comprising: a turbine for generating a variable AC from a variable flow; a rectifier for converting the variable AC to a variable first DC; a first DC-DC associated with a storage component; a second DC-DC associated with an inverter; a dual mode circuit for alternately toggling between the first DC-DC and the second DC-DC; and a controller for: operating the circuit to store the first DC in the storage component when the first DC is below a target level, and release energy at the target level using the first DC-DC when the energy reaches the target level; operating the circuit to convert the variable DC to the target level using the second DC-DC when the variable DC is above the target level; and output a target level DC including the released energy or the second DC.

The invention provides a mechanical arm power-down protection circuit and a sweeping robot, and relates to the technical field of motor control, the mechanical arm power-down protection circuit comprises a power supply module, a micro-control module, a relay and a mechanical arm control module, when the power supply module supplies power, a control end of the relay is electrified to control a common end to be conducted with a second connecting end, and the mechanical arm control module controls the micro-control module; the micro-control module controls the power supply module to be connected with the input end of the motor. When the power supply module is powered off, the control end of the relay is powered off, the common end is connected with the first connecting end, the input end of the motor is connected with the grounding end, and a coil of the motor forms loop current and generates resistance to slow down descending of the mechanical arm. By means of the automatic switching function of the relay, the connection state of the motor is rapidly switched when a power source is cut off, resistance is generated through the physical characteristics of the motor so as to slow down descending of the mechanical arm, the circuit structure is simple, cost is low, large installation space does not need to be occupied, and the circuit can be applied to mechanical arms of various sizes and models; and the method has a relatively wide application range.

The disclosure is directed to a brake chopper, a control board, a bus voltage control method, a device and a medium. The brake chopper may include a resistor module, electrically connected to a DC bus to form an energy release circuit of the DC bus; a control module, for determining the difference between a voltage value of the DC bus and a preset first threshold, and generating a first switch control signal on the basis of the difference; and a switch module, for controlling the ON time of the energy release circuit on the basis of the first switch control signal. There may be a progressively increasing relationship between the ON time and the difference. The ON time of the energy release circuit may be precisely controlled based on the difference between 10 the DC bus voltage value and the first threshold, increasing the energy utilization rate of the DC bus.

The invention provides an energy recovery system, a control method thereof and electronic equipment, and belongs to the technical field of energy recovery. The energy recovery system is applied to an offshore wind power installation vessel and comprises a main distribution board direct current bus, a voltage detection module, a lifting system, a battery energy storage system, a brake unit and a control system. Wherein the control system can control charging of the battery energy storage system and / or control starting and stopping of the braking unit according to the direct-current bus voltage, collected by the voltage detection module, of the main distribution board and the battery charge state of the battery energy storage system. In other words, the control system can recover and consume energy generated in the operation process of the lifting system by controlling the battery energy storage system and / or the brake unit, the situation that the voltage of a direct-current bus of a main distribution board is increased due to regenerated energy, and consequently electric equipment is damaged is avoided, and the stability and safety of the lifting system are improved.

The present invention relates to a resistor unit (1, 1', 1''), comprising: at least one electrical resistor (10), at least one fluid-carrying cooling unit (30) on and / or in which at least part of the at least one electrical resistor (10) is arranged, at least one detection unit (3, 4, 5, 6, 7, 71, 72) and at least one evaluation device (40) that can be operatively connected to the at least one detection unit (3, 4, 5, 6, 7, 71, 72), the at least one detection unit (3, 4, 5, 6, 7, 71, 72) being configured to measure a variable that represents the temperature (TR) of the at least one electrical resistor (10) per se or in combination with a further detection unit (3, 4, 5, 6, 7, 71, 72) and that relates to an electrical property of the at least one electrical resistor (10) and / or to a property of a fluid flowing through the fluid-carrying cooling unit (30). The present invention additionally relates to a brake system and to a vehicle having such a resistor unit and to a method for estimating a temperature of the fluid-cooled electrical resistor.

The utility model provides a frequency converter system and a dynamic braking module. The frequency converter system comprises a frequency converter, a motor and an energy consumption braking module. The motor is connected to the output end of the frequency converter. The energy consumption braking module is connected between the output end of the frequency converter and the motor. The energy consumption braking module comprises a braking resistor and a braking switch connected with the braking resistor in parallel, and the braking switch can be switched on or switched off to stop or start energy consumption braking of the braking resistor. According to the frequency converter system, a hardware structure in the frequency converter does not need to be changed, the frequency converter without the energy consumption braking function can have the energy consumption braking function by externally connecting the energy consumption braking module, in other words, the rapid shutdown and rapid speed reduction capacity is achieved, the universality is high, the effect is good, implementation is convenient, manpower, time and hardware cost can be saved, and the practicability is high. The motor is not damaged, and the safety and high reliability of a frequency converter system can be guaranteed.

A motor control device includes a torque command calculation unit that calculates a torque command value, a current command calculation unit that calculates a current command value, a power converter, and a stop position adjuster. The stop position adjuster executes a stop position adjustment process that adjusts the rotation stop position within a specified position adjustment range when a lock current is applied while the rotation of the multiphase motor is stopped, except in cases where specified exemption requirement is met. In the stop position adjustment process, the stop position adjuster adjusts the rotation stop position so as to bias the current to one or more high heat dissipation phases having a relatively high heat dissipation property among the phases. The torque command calculation unit or the current command calculation unit calculates a torque command value or a current command value reflecting an adjusted rotation stop position.

Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

A motor control device includes a torque command calculation unit that calculates a torque command value, a current command calculation unit that calculates a current command value, a power converter, and a stop position adjuster. The stop position adjuster executes a stop position adjustment process that adjusts the rotation stop position within a specified position adjustment range when a lock current is applied while the rotation of the multiphase motor is stopped, except in cases where specified exemption requirement is met. In a stop position adjustment process, the stop position adjuster adjusts the rotation stop position so as to reduce a current absolute value of a maximum current phase having a maximum current absolute value among the phases. The torque command calculation unit or the current command calculation unit calculates a torque command value or a current command value reflecting an adjusted rotation stop position.

The invention relates to a motor control circuit, method and module, a storage medium, a controller and a vehicle, and the motor control circuit comprises a detection circuit and a protection circuit. The detection circuit is used for detecting a detection parameter generated by the counter electromotive force generated by the motor; and the protection circuit is used for disconnecting the motor and the motor driving circuit when the detection parameter meets a first condition, so as to at least partially solve the problem that the ASC scheme cannot be directly executed, and the bus capacitor and the battery pack are reversely charged by overhigh counter electromotive force through the fly-wheel diode of the switching tube.

One aspect of the present disclosure provides an electric work machine including a brushless motor, a drive circuit, and a control circuit. The control circuit executes a driving operation, a braking operation, and a switching operation. In the driving operation, the brushless motor is rotated based on a back-EMF of the brushless motor. In the braking operation, a switch pair of six switches in the drive circuit is turned on, and the other four switches are turned off. The switching operation is performed during the braking operation. The switching operation includes switching the switch pair. In the switching operation, an off-target switch is turned off based on an electric current flowing through the off-target switch satisfying an off-requirement.

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.

The invention relates to a device for transferring the drive of a vehicle into a safe operating state, wherein the drive comprises an electric machine, in particular a synchronous machine, which is operated with electrical energy from an electrical energy store via an intermediate circuit and an inverter. The device is designed to determine, on the basis of an intermediate circuit voltage of the intermediate circuit, that a transfer procedure is to be carried out in order to transfer the drive into the safe operating state and, in response thereto, to bring about a freewheeling operation of the inverter in a freewheeling phase of the transfer procedure. The device is also designed to determine, on the basis of the intermediate circuit voltage, that the freewheeling operation of the inverter is to be ended and, in response thereto, to bring about a short-circuit operation of the inverter in a short-circuit phase of the transfer procedure, which short-circuit phase follows the freewheeling phase.

The invention relates to the technical field of vehicle power supplies, in particular to a power supply control method and system of a motor controller. The system comprises an upper bridge auxiliary power supply, a lower bridge auxiliary power supply, an upper bridge driving chip, a micro-control unit, a power supply chip and a three-level safety module realized based on hardware, wherein the upper bridge auxiliary power supply and the upper bridge driving chip are powered by a battery, and the lower bridge auxiliary power supply and the lower bridge driving chip are powered by a high-voltage bus; the input end of the three-stage safety module is connected with the power supply chip, and the output end of the three-stage safety module is connected with the lower bridge driving chip; and the power supply chip is connected with the micro-control unit and is used for carrying out fault detection on the micro-control unit and sending a lower bridge active short circuit control signal to the third-stage safety module under the condition that the fault of the micro-control unit is detected.

Provided are a safety control method and apparatus for an electric drive system, a device, and a storage medium. The safety control method for an electric drive system includes: acquiring a current operating mode of an electric drive system, the current working mode includes a boost charging mode and a power output mode; configuring a safety state corresponding to the current operating mode for the electric drive system; and when a fault occurs, controlling the electric drive system to enter the safety state, in the safety state, the output torque of the electric drive system is caused to be less than or equal to a preset torque value corresponding to the current operating mode.

A robot arm comprising: a first link connected to a second link by a joint, the joint permitting the second link to move relative to the first link; a motor for driving the joint; and a controller for controlling the motor. The controller is configured to electrically brake the motor in response to detection of a fault in the robot arm by applying a braking current to the motor so as to maintain the position of the joint against gravity. The controller only performs this electrical braking if the joint is in a configuration in which the robot arm will droop under gravity if the joint is not actively driven.

The utility model discloses an electronic brake circuit for an electric chain saw, which comprises a power supply module, an MCU (Microprogrammed Control Unit) control module, a voltage detection module, a driving module, a front trigger switch S1 and a rear trigger switch S2, the front trigger switch S1 is electrically connected with the input end of the voltage detection module, the rear trigger switch S2 is electrically connected with a battery pack, and the front trigger switch S1 and the rear trigger switch S2 are connected in series; the voltage detection module is used for detecting voltage information of the whole electric chain saw, converting the voltage information of the whole electric chain saw into a VAD signal and transmitting the VAD signal to the MCU control module, the MCU control module is used for comparing the received VAD signal with a preset value in the MCU control module and sending feedback information to the driving module, and the driving module is used for controlling a circuit of the whole electric chain saw to be connected or disconnected. By means of the structure, on one hand, identification and fixation of the switching sequence are achieved, a mechanical interlocking structure does not need to be added, production efficiency is improved, on the other hand, the electronic brake function is achieved, and use safety is further improved.