134results about "Dc motor stoppers" patented technology

A power storage system has a battery, a three-phase motor in which coils of three phases are connected at a neutral point, an inverter connected on an electric power transmission path between the battery and the three-phase motor, and a DC power supply circuit connected to a connection portion positioned on an electric power transmission path between the inverter and the battery. The battery includes two power storages and a switch unit that switches between a first voltage state where the two power storages are connected in series and chargeable at a first voltage, and a second voltage state where the two power storages are connected in parallel and chargeable at a second voltage. The DC power supply circuit has a branch circuit connected to a coil of any one phase among the coils of three phases at a positive electrode side of the DC power supply circuit.

A locomotive has a power bus that provides power to components of the locomotive when operating in a motoring mode or a charging mode. A plurality of batteries, one or more traction motors, and a charging source are all connected to the power bus. The batteries are operable to provide power to the power bus when operating in the motoring mode, and to receive power from the power bus when operating in the charging mode. The traction motors are operable to receive power from the power bus when the locomotive is operating in the motoring mode. The charging source intermittently provides charging power to the power bus to charge the batteries when the locomotive is operating in the motoring mode or in the charging mode. The charging source is selectively activated and deactivated based at least in part on the state of charge of the batteries.

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%.

The invention relates to a method for de-exciting a rotor winding of a rotor of an electric machine (2) of a motor vehicle (1), the electric machine comprising a stator and a rotor mounted rotatably relative to the stator, the rotor having a rotor winding for generating a rotor magnetic field, an active rectifier being arranged on the rotor side, the rectifier comprises at least one field effect transistor which can be actuated by means of an actuation voltage, the rectifier electrically connects a voltage source present on the rotor side to the rotor winding, by means of which an alternating voltage provided by the voltage source can be converted into a direct voltage, the field effect transistor or at least one of the field effect transistors is brought into an operating state, in which the respective field effect transistor forms an ohmic resistance, by means of a control voltage, and the energy stored in the rotor winding causes a current to flow through the at least one field effect transistor forming the ohmic resistance, at least a portion of the energy is converted into thermal energy.

A control circuit for realizing motor braking through two-wire lap joint belongs to the technical field of a goods channel motor control circuit of a food machine, and comprises an MCU control unit P1, an MCU control unit P2, a motor M01 and an SW-SPDT switch, one path of the MCU control unit P2 is connected with the MCU control unit P1, the other path of the MCU control unit P2 is connected with the MCU control unit P1 through the SW-SPDT switch, one path of the output of the MCU control unit P1 is connected with the positive electrode of the motor M01, and the other path of the MCU control unit P2 is connected with the negative electrode of the motor M01 through the SW-SPDT switch. And the other two output paths of the MCU control unit P1 are connected in parallel and then are connected with the negative electrode of the motor M01. The utility model ensures that the motor stops without delay after the power supply is cut off. A triode Q1 is additionally arranged, so that induced electromotive force generated by kinetic energy of the motor disappears. A diode D2, a diode D1 and a capacitor C1 are additionally arranged, so that the stability of circuit voltage is ensured, the stable operation of the motor M01 is protected, the stability of the circuit is improved, and the service life of the motor is prolonged.

To recover a regenerative current without requiring an additional component.SOLUTION: A method includes a first determination step (E1) of determining a d-axis current intermediate value Idstat and a q-axis current intermediate value Iqstat of an AC supply current of a motor, a second determination step (E2) of determining a d-axis current target value Idcible and a q-axis current target value Iqcible, and a drive step (EP) of driving the at least one inverter by a microcontroller on the basis of the d-axis current target value Idcible and the q-axis current target value Iqcible.SELECTED DRAWING: Figure 2

The invention provides a smooth deceleration shutdown control device and method for a sheath forming machine, and relates to the technical field of industrial automation control, the smooth deceleration shutdown control device comprises a main controller, a low-voltage direct-current motor, a multi-turn potentiometer and a transmission and overload protection assembly, the multi-turn potentiometer is connected with the low-voltage direct-current motor through a transmission assembly, and the transmission assembly is connected with the low-voltage direct-current motor. The signal output end of the microprocessor is connected to the main controller; the output end of the main controller is connected to a driver of an equipment main motor, during working, the main controller starts the low-voltage direct-current motor and drives the multi-turn potentiometer to rotate so as to generate a linearly changing resistance signal, the signal serves as a speed given value, and the main controller adjusts the output of the driver of the main motor in real time through a configured closed-loop control algorithm so as to control the speed of the equipment. According to the control method, the problems of sheath quality damage and mold jamming caused by sudden stop of the sheath forming machine are effectively solved, and the control method has the advantages of being accurate in control, high in reliability and high in adaptability.

The application discloses a single-power-supply double-input-end digital isolated brush motor servo driving device, and belongs to the technical field of motor driving. The device comprises a double-end input isolation control interface circuit, a control driving circuit, a power output H-bridge circuit, a current-limiting protection circuit and a system power supply circuit. The double-end input isolation control interface circuit is connected with a signal source. The system power supply circuit is connected with an external power supply. The system power supply circuit is connected with the double-end input isolation control interface circuit and the control driving circuit. The power output H-bridge circuit is electrically connected to the external power supply. The power output H-bridge circuit is connected with a direct-current brush motor. The double-end input isolation control interface circuit comprises an optical coupler O1 and an optical coupler O2, and outputs signals to the control driving circuit. The power output H-bridge circuit is controlled according to the output signals to drive the direct-current brush motor. The application has the effects of being capable of regulating and controlling various states of the motor through a simple circuit, low cost and small space occupation.

A heating, ventilation, air conditioning, and / or refrigeration (HVAC&R) system (10) includes a compressor (32) having a bearing (106). The HVAC&R system (10) also includes a pump (112) configured to supply a flow of pressurized fluid to the bearing (106). Additionally, the HVAC&R system (10) includes a main power supply (210) configured to supply power to the pump (112). Furthermore, the HVAC&R system (10) includes an uninterruptible power supply (218) configured to supply power to the pump (112) in response to an interruption in supply of power to the pump (112) via the main power supply (210).

The utility model discloses a novel control system for an AC voltage-stabilized power supply. The novel control system comprises a master control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a man-machine interaction module, a communication module, a storage module and a protection module. The master control MCU module is connected with the signal measuring circuit, the man-machine interaction module, the communication module and the storage module through an SPI bus. The direct current motor control circuit adopts a full-bridge topological structure, is connected with the main control MCU module through an optical coupling isolator, and receives a PWM signal to control the positive and negative rotation and rapid braking of a motor; the power conversion circuit adopts a two-stage voltage reduction structure, the voltage of the first stage is reduced to 8V from + 12V, and the output of the second stage is 5V and 3.3 V. According to the utility model, a full-bridge topological structure and a + 12V single power supply are adopted for power supply, flexible forward rotation, reverse rotation and rapid braking control are realized, and the dynamic response capability of the system is improved.

This invention relates to the field of motor control technology and discloses a sensorless brushed DC motor control method. The method includes calculating the optimal tracking angle of the control panel and obtaining the current angle of the control panel; acquiring the current signal of the brushed DC motor through a ripple current conversion circuit, converting the current signal into a PWM pulse signal and inputting it to an MCU; the MCU counting the number of ripples per unit time and calculating the motor speed based on the number of ripples; controlling the brushed DC motor to start running based on the current angle and the optimal tracking angle of the control panel; during the operation of the brushed DC motor, calculating the optimal stopping angle based on the motor current and motor speed, while simultaneously acquiring the current angle of the control panel in real time, and controlling the brushed DC motor to stop running when the current angle of the control panel reaches the optimal stopping angle. The advantages of this invention are that it can achieve precise speed control of a brushed DC motor without sensors and effectively reduce implementation costs.

According to the embodiment of the invention, the action method of the pipeline moving device is provided, and the method comprises the following steps: obtaining the moving speed of a machine body part; determining whether braking is required for the fuselage part based on the speed; and setting, according to a result of the determination, an output state of a motor that rotates in conjunction with a guide wheel of the body, the output state including one of a load state in which a load is electrically connected to the motor and a non-load state in which the load is electrically separated from the motor.

The application discloses a clutching circuit, comprising: a control circuit, generating a releasing signal and a clutching signal; a first switch circuit, a control end of which is connected with the control circuit, a first communication end of which is connected with a first end of a clutching inductor of a motor, and a second communication end of which is connected with a second end of the clutching inductor; a second switch circuit, a control end of which is connected with the control circuit, a first communication end of which is connected with the second end of the clutching inductor, and a second communication end of which is grounded; and a one-way conducting circuit, a first end of which is connected with the first communication end of the second switch circuit, and a second end of which is connected with the first communication end of the first switch circuit; the two switch circuits are turned on under the control of the releasing signal, a releasing voltage is applied to both ends of the clutching inductor based on a first power supply voltage, and the releasing is realized; in the releasing state, the second switch circuit is turned off under the control of the clutching signal, a negative voltage of the releasing voltage is applied to both ends of the clutching inductor, and the clutching is realized. The application can improve the clutching response speed of the motor and improve the coasting phenomenon.

Method for operating a vehicle electrical system (10, 50) comprising a first actuator and a second actuator, and the first actuator and the second actuator are connected to each other via a common control unit, wherein energy fed back from the first actuator is transferred via the common control unit to the second actuator and is at least partially consumed in it.

A cordless aw is provided with regenerative braking means that increases the number of repeated cuttings the saw is able to perform (x) per full discharge cycle of the battery pack, as compared to the number of repeated cuttings achievable by the same saw not employing a regenerative braking means (y) per full discharge cycle of the battery pack, such that x / y is approximately at least one of the following: i) 1.1 when cutting a Pressure-Treated (PT) lumber workpiece having a cross-sectional size of approximately 89 mm×89 mm±2 mm, ii) 1.15 when cutting a Spruce Pine Fir (SPF) lumber workpiece having a cross-sectional size of approximately 38 mm×89 mm±2 mm, or iii) 1.25 when cutting Medium Density Fiberboard (MDF) workpiece having a thickness of approximately 19 mm±1 mm and a width of approximately 76 mm±2 mm.

A regenerative braking system for an electrified vehicle includes a battery system, an electric motor and a regenerative system resistor. The battery system selectively stores and delivers power. The electric motor is powered by the battery system and transfers drive torque to a driveline for propulsion of the vehicle and that selectively directs regenerative power in a first mode to the battery system during regenerative braking. The regenerative system resistor is selectively moveable between a first position during the regenerative braking in the first mode and a second position where regenerative power is directed to the regenerative system resistor and dissipated as heat in a second mode.

The embodiment of the utility model provides an electric tool, which comprises a power input interface capable of being electrically connected to a power supply, a motor, a direct current-direct current power converter electrically connected with the motor, and a secondary energy storage device electrically connected with the direct current-direct current power converter, and a controller electrically connected with the DC-DC power converter. The controller is configured to control the DC-DC power converter to deliver braking current generated by the motor to the secondary energy storage device during regenerative braking operation.

An apparatus may include a first terminal, a second terminal, a direct current (DC) motor, a brake mechanism, and a voltage blocking mechanism. The DC motor may be configured to operate when a voltage is applied across the first terminal and the second terminal. The brake mechanism may be configured to apply braking to the DC motor when no voltage is present across the first terminal and the second terminal, and remove the braking from the DC motor when the voltage is applied across the first terminal and the second terminal. The voltage blocking mechanism may be configured to prevent the DC motor from operating when the voltage is applied across the first terminal and the second terminal until the braking from the brake mechanism is removed from the DC motor.

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.

Motor drive device (1) comprising: a drive unit (2) configured to drive a starter / generator (4) which is directly connected to a motor via a rotating shaft by performing on / off control of each of the switching elements (UH, UL, VH, VL, WH, WL) in a bridge circuit (23) to drive a motor; and a drive control (3) designed to control a drive operation performed by the drive unit (2) for the starter / generator (4), wherein the drive unit (2) is configured to control a motor drive voltage for the starter / generator (4) by changing the ON time period of the switching elements (UH, UL, VH, VL, WH, WL) of the bridge circuit (23) and to perform an active freewheeling operation to raise a backfeed voltage generated by the starter / generator (4) by alternately switching on the predetermined switching element and a complementary switching element within a period in which a gate drive signal for a predetermined switching element is at a low level, thereby forming a current path caused by a backfeed voltage and wherein the drive control (3) is configured to instruct the drive unit (2) to control the motor drive voltage and the switching on and off of the active freewheel on the basis of a battery voltage.

A power pack for a power tool controls and dissipates energy from motor operation. The power pack includes an electric motor that provides power to the power tool, and a non-transitory computer-readable storage medium having computer-executable instructions configured to monitor and control operation of the electric motor and the power tool.

The present disclosure provides an actuator braking method, device and braking system. The method comprises: in a first braking phase, generating a first braking waveform of the first braking phase of the actuator based on a voltage value and / or a back electromotive force value of the actuator, and playing the first braking waveform; in a second braking phase, generating a second braking waveform of each cycle period based on the back electromotive force value of the actuator in each cycle period, and playing the second braking waveform of each cycle period. Thus, the present disclosure can effectively improve the braking performance of the actuator and reduce the braking noise by performing continuous braking in the first braking phase and intermittent braking in the second braking phase.

A multi-disk brake system comprises an electrical generator (105) disposed therein. The electrical generator is configured to convert mechanical energy to electrical energy. The mechanical energy may be generated during a braking event of the multi-disk brake system. The electric generator may power various electrical components on the aircraft or store the electrical energy in a capacitor bank. The electric generator may also act as a motor and / or power a landing gear in a motor configuration.

To make it possible to give a drive command and a brake command to a motor using a small number of control signals. For this purpose, a motor control apparatus for controlling a motor via a drive circuit includes a generation unit for generating a short-circuit brake signal for applying a short-circuit brake to the motor in a case where a control signal for controlling the motor instructs a stop of the motor, and an instruction unit for outputting an instruction for the short-circuit brake to the drive circuit in a case where the short-circuit brake signal is being generated, and outputting an instruction based on the control signal to the drive circuit in a case where the short-circuit brake signal is not being generated.

In a washing machine according to an embodiment of the present disclosure, when a voltage of a DC link capacitor is equal to or greater than a predetermined voltage, an energy storage device is charged with the voltage of the DC link capacitor by using a step-down power converter capable of stepping down a DC voltage, and when the voltage of the DC link capacitor drops, the DC link capacitor is charged by discharging the energy storage device. In addition, the washing machine can use regenerative braking energy by stepping down or stepping up the voltage from the energy storage device to a load by using a power conversion device.

A system and method for reducing energy loss in a multiple inverter system provides a DC voltage to multiple inverters via a shared DC bus. Each inverter is configured to control operation of a motor operatively connected to a corresponding inverter. An amplitude of the DC voltage present on the DC bus is monitored, and each inverter selectively draws current from or delivers current to the DC bus. An amplitude of the current drawn from or delivered to the DC bus is monitored by each inverter. A level of energy delivered by at least one of the inverters to the DC bus is determined when the amplitude of the DC voltage exceeds a predefined threshold during a first operation of the multiple inverter system. At least one subsequent operation of the multiple inverter system is adapted responsive to the level of energy delivered to the DC bus.

To provide an electrode having excellent cycle performance and output performance, a secondary battery including the electrode, a battery pack including the secondary battery, and a vehicle including the battery pack.SOLUTION: An electrode includes inorganic particles 13, niobium titanium oxide particles 11, and an inorganic particle-containing layer 12 that covers at least a part of the surface of the niobium titanium oxide particles. The average particle size of the inorganic particles 13 is larger than the thickness of the inorganic particle-containing layer 12.SELECTED DRAWING: Figure 1

An apparatus and method for controlling a motor are provided. The apparatus includes: a switch connected to a power source and configured to close and open a circuit; a relay connected to the motor and configured to switch the polarity of the motor by switching the connection of its contacts; and a controller connected to the switch and the relay and configured to control the closing and opening of the switch and control the connection of the relay with the contacts. Therefore, the solution for controlling a motor according to embodiments of the present invention has a simple structure and low cost.

A method is described for controlling an electrical appliance having an electric motor. The method includes receiving fall data indicative of whether the electrical appliance is in free fall, and braking the electric motor, based on the fall data, in the event that the electrical appliance is in free fall.

The invention relates to the technical field of motor control, and discloses a rapid deceleration shutdown method and device, and the method comprises the steps: judging whether a motor receives rapid braking information or not in the operation process of the motor; if the motor receives the rapid braking information, controlling the motor to start short-circuit braking after a shutdown condition is detected; and if the motor does not receive the rapid braking information, controlling the motor to decelerate and stop along with a preset deceleration slope after a stop condition is detected. And short-circuit braking is adopted to realize rapid shutdown, so that the shutdown time is greatly shortened while the stability of the bus voltage is ensured.