Abstract: A motor control device includes a motor drive circuit including an upper arm and a lower arm, an arithmetic processor to control the motor drive circuit, an alternative circuit that can operate as a substitute to replace the arithmetic processor, and a mode switch to switch a control mode between a first control mode, in which the arithmetic processor controls the motor drive circuit, and a second control mode, in which the alternative circuit controls the motor drive circuit, based on a state of the arithmetic processor. The mode switch switches the control mode from the first control mode to the second control mode when a state of the arithmetic processor changes from a normal state to an abnormal state.

Abstract: The disclosure discloses a motor driving method, an apparatus, and a system, and relate to the chip field. The solution may include: When a motor control apparatus determines that a motor needs to rotate at a maximum torque, the motor control apparatus controls a driver to output a first current to drive the motor to rotate. The first current is greater than a rated peak current of the driver and is less than or equal to a maximum load current of the driver. This method can resolve a problem that a waste of costs is caused because a through-current capability improved by a redundancy design of a switching transistor of a motor driver cannot be fully utilized for most customers and application scenarios.

Abstract: A motor system includes a brushless direct current motor, a back electromotive force (EMF) circuit, and a control unit. The brushless direct current motor includes first to third windings. The back EMF circuit is coupled to the first to the third windings. The control unit is coupled to the back EMF circuit for floating the first winding, energizing the second winding, and energizing the third winding prior to detect a zero-crossing event. The back EMF detects a duration of a freewheeling period of a back EMF signal of the first winding and a zero-crossing event. The control unit updates respective initial angles of respective driving currents of the first to the third windings according to the duration of a freewheeling period, and performs commutation according to respective updated initial angles of the respective driving currents of the first to the third windings upon detecting the zero-crossing event.

Abstract: A method of controlling an electric motor includes pulsing the electric motor and phase shifting the modulation frequency. Pulsing the electric motor at the modulation frequency propels a vehicle to increase efficiency of the electric motor. Phase shifting the modulation frequency includes phase shifting between 0 degrees and 180 degrees to reduce vibrations induced in the vehicle.

Abstract: Disclosed is an apparatus for excitation signal generation for a resolver. The apparatus includes a sine wave generator that generates a sine wave based on a square wave, an amplifier that amplifies the sine wave, a differential signal generator that converts, into a differential signal, the amplified sine wave, a driver that inputs the differential signal to a coil, and a processor that generates an excitation signal by increasing a voltage of the sine wave from a start voltage to a target voltage through at least one of the sine wave generator and the amplifier based on a transient current that flows into the coil in a transient response interval.

Abstract: A power module for driving a motor includes: a positive bus input voltage terminal; a phase terminal for each motor phase; an inverter including a half bridge for each motor phase, each half bridge including a high-side power switch electrically coupled between the positive bus input voltage terminal and respective phase terminal, and a low-side power switch electrically coupled between the respective phase terminal and ground; a first driver circuit for driving a gate terminal of each power switch; a protection switch electrically coupled in series between the positive bus input voltage terminal and each high-side power switch, and having a greater short-circuit withstand time and a lower short-circuit current level compared to each inverter power switch; and a second driver circuit for turning on the protection switch during normal operation and turning off the protection switch in response to a detected short circuit condition.

Abstract: According to one embodiment, a motor drive apparatus is an apparatus which drives a motor including a plurality of phase windings in a mutually unconnected state, and includes first and second inverters. The first and second inverters are first and second modules each of which is configured in such a manner that a switching circuit including a positive side terminal and negative side terminals and a drive circuit intended to drive the switching circuit are accommodated in one package, and which possess configurations identical to each other, and the first and second modules are arranged on a circuit board in a state where the negative side terminals of the modules are respectively close to each other.

Abstract: Aspects of the present disclosure relate to self-heating electric motor control. In examples, a motor controller includes a normal control scheme and a heating control scheme, whereby the heating control scheme causes the electric motor to produce heat (in addition to or in the absence of mechanical operation of the electric motor). For example, if the electric motor has cooled below a minimum operating temperature, the heating control scheme is used to heat the electric motor prior to mechanical operation of the electric motor. As another example, the electric motor may approach or fall below a minimum operating temperature during operation, such that the heating control scheme is used to cause the electric motor to produce additional heat while in operation. Thus, the electric motor is heated as a result of the heating control scheme, as are one or more associated mechanical or electrical components.

Abstract: The present invention is directed at a method for operating rotating machinery, such as an electric motor, by means of a variable speed drive (VSD). The variable speed drive is provided for identifying mechanical resonance points by means of a sensor and corresponding speeds of the machinery; storing the speeds at which the identified mechanical resonance points occur; and bypassing the speeds at which the identified mechanical resonance points occur during operation of the rotating machinery. The invention is also directed at a variable speed drive for performing said method.

Abstract: An apparatus includes a controller that measures a first voltage across a first circuit path including a series connection of a first switch and a shunt resistor. The first voltage generated based on first current supplied from a first winding of a motor including multiple windings. Based on the magnitude of the first voltage, the controller determines an ON-resistance of the first switch. The ON-resistance can be used final office action any suitable purpose. For example, the controller can be configured to use the determined ON-resistance of the first switch to controller operation of a motor including the first winding. For example, the determined ON-resistance can be used as a basis to determine an amount of current through first switch and corresponding first winding of the motor.

Abstract: An electric motor system (100), comprising: a motor unit (110) comprising: a first part (120); a second part (130) movable relative to the first part (120); a plurality of spaced activatable motor elements (140) provided on the first part (120), each activatable motor element (140) being operative when activated by application of an electric current thereto for creating relative movement between the first and second parts (120, 130); and a plurality of power electronics drive modules (150), each power electronics drive module (150) being operatively associated with a different subset of the plurality of activatable motor elements (140) and comprising a power converter (155) operative to convert direct current into a periodic current for powering the activatable motor elements (140); and a power supply arrangement (170) comprising: at least one direct current power source (180); and a plurality of n parallel direct current power supply lines (190), each of the parallel direct current power supply lines (190) b

Abstract: Included are a drive control signal generation unit configured to generate a drive control signal for a motor in accordance with a target rotation speed of the motor and a rotation speed of the motor calculated in response to a rotation position detection signal of the motor; a rotation speed signal generation unit configured to generate a rotation speed signal having a frequency corresponding to the rotation speed of the motor, in response to the rotation position detection signal of the motor; an abnormality determination processing unit configured to determine whether a condition value for abnormality determination of the motor has reached a predetermined threshold value, for each predetermined abnormality determination period, and generate an abnormality determination signal distinguishable from the rotation speed signal when the abnormality determination processing unit determines that the condition value has reached the predetermined threshold value; and a signal output unit configured to output the rot

Abstract: A robotic system is configured to evaluate an identified phase of a medical procedure. The robotic system includes a video capture device; a robotic manipulator; one or more sensors; an input device; a data store; and control circuitry. The control circuitry is configured to: determine a first status of the robotic manipulator based on sensor data from the one or more sensors; identify a first input from the input device for initiating a first action of the robotic manipulator; perform a first analysis of a video of a patient site captured by the video capture device; identify a first phase of the medical procedure based at least in part on the first status of the robotic manipulator, the first input, and the first analysis of the video; and generate an evaluation of the first phase of the medical procedure based on one or more metrics associated with the first phase.

Abstract: A motor drive system of the embodiment includes a power converter, a state detector, a frequency calculator, a frequency correction command generator, a drive amount limiter, and a speed controller. The power converter drives a motor by PWM control. The state detector detects a drive state of the motor. The frequency calculator detects a size of a specific frequency component which fluctuates according to the drive state by using an index value indicating the drive state. The frequency correction command generator generates a correction command of a carrier frequency used for the PWM control on the basis of a detected result of periodic fluctuation of the drive state. The drive amount limiter limits a drive amount of the motor.

Abstract: A device for disconnecting an actuation of a power stage of an electric machine includes: a first input for detecting a safety function signal and a second input for detecting a reference potential of the safety function signal; and at least one switch-off path of the actuation, each of the at least one switch-off path including: an input coupler connected between the first input and the second input on an input side for transmitting the safety function signal from the first and second inputs; and at least one output for actuating a switch of a half bridge of the power stage, and at least one modulation logic unit for logically linking a modulation signal associated with a respective switch and the safety function signal transmitted by a respective input coupler and to output it at the output as a disconnectable modulation signal.

Abstract: A flyback electric charge regenerative brake system, including a transmission shaft connected to and can be drive by the recycled kinetic energy, several pieces of rotating discs and fixed plates are stacked staggered and strung by the transmission shaft perpendicularly; on the plane of all rotating discs, staggered arrangement several pieces of the conductive films that can be charged with positive and negative charges. On the plane of all fixed plates, arrangement several pieces of neutral conductive films been paired and connected by a transformer; when the transmission shaft rotates the rotating discs via the recycled kinetic energy, the positive conductive films and the negative conductive films on the plan of the rotating discs will passing above each pair of the neutral conductive films on the plan of the fixed plates.

Abstract: An electrical propulsion system includes an electrical motor configured to drive one or more propellers of the aircraft, a capacitor configured to stabilize a direct current (DC) bus voltage, a first inverter circuit coupled to the capacitor and configured to convert the DC bus voltage to alternate current (AC) voltages to drive a first set of stator windings of the electrical motor, in response to a first pulse width modulation (PWM) vector, and a second inverter circuit coupled to the capacitor and configured to convert the DC bus voltage to AC voltages to drive a second set of stator windings of the electrical motor, in response to a second PWM vector. The first PWM vector and the second PWM vector are substantially equal and opposite vectors.

Abstract: A motor driver using a motor magnetic pole reference controlling mechanism is provided. A motor position detecting circuit detects a rotor of a motor to determine a plurality of magnetic pole positions to which the rotor of the motor is switched respectively during a plurality of time intervals. A reference magnetic pole switching circuit selects one of the plurality of time intervals according to a change in rotational speed of the motor over time. The reference magnetic pole switching circuit uses the magnetic pole position to which the rotor of the motor is switched during the one of the plurality of time intervals as magnetic pole reference data. A motor driving circuit drives the motor according to the magnetic pole reference data from the reference magnetic pole switching circuit.

Abstract: Electromechanical actuation systems and related operating methods are provided. A method of controlling an electromechanical actuator in response to an input command signal at an input terminal involves determining a commanded actuation state value based on a characteristic of the input command signal, generating driver command signals based on the commanded actuation state value and an actuator type associated with the electromechanical actuator, and operating driver circuitry in accordance with the driver command signals to provide output signals at output terminals coupled to the electromechanical actuator.

Abstract: Apparatus and associated methods relate to a post temperature calibration translation circuit (PTCTC) configured to generate a signal corresponding to a predetermined temperature voltage translation relationship (TVTR). In an illustrative example, the PTCTC may be coupled to a motor controller including a control logic to regulate a power input to a motor based on the TVTR. The PTCTC further includes an input port configured to receive a temperature sensor output based on a predetermined transfer function. At least one analog corrective translation circuit (ACTC), for example, may generate temperature input signals to the motor power controller based on the temperature sensor output. The temperature input signals are generated based on a calibrated transfer function such that the temperature input signals substantially match an output according to the TVTR. Various embodiments may advantageously avoid modification of the control logic when the predetermined transfer function is altered.