A method for controlling and/or protecting an actuator of a piece of mobile equipment of a building, the actuator comprising a motor, comprises the steps consisting of (E1) providing an instantaneous signal representative of the electrical power provided to the motor, (E2) carrying out a sampling of values of the instantaneous signal, (E3) performing a control of each sampled value according to a first protection criterion of the actuator, and issuing a first piece of anomaly information for each sampled value that does not satisfy the first criterion, (E3′) acquiring a set of values from the sampled values, (E4′) performing a control according to a second protection criterion of the actuator applied to all of the acquired sampled values, and issuing a second piece of anomaly information for all of the acquired sampled values that do not satisfy the second protection criterion.

Technical solutions are described for mitigating braking torque in a motor of a steering system caused by a FET short. For example, an example mitigation system includes a mitigation module that adjusts a motor torque in response to a FET short. The mitigation system further includes a mitigation-enable module that selectively enables and disables the mitigation module based on a handwheel torque signal. Further, the mitigation system includes a damping module that reduces the motor torque based on a motor velocity signal for the motor.

An apparatus includes a controller. To control current through a motor winding, the controller monitors a magnitude of current supplied through the motor winding. The controller compares the magnitude of current to a threshold value. In response to detecting that the magnitude of current crosses the threshold value, the controller terminates a flow of the current through the motor winding. In one application, termination of the current through the motor winding supports more efficient use of energy to drive the motor winding. For example, via the controller, terminating the current through the motor winding to prevent the current from flowing in a reverse direction through the motor winding.

A system and a method of detecting and isolating a fault in an electric motor system are provided. The method includes detecting, at a motor drive electronics (MDE) component that is configured to drive an electric motor through a harnessing, the fault in the electric motor system, applying a voltage and current, at the MDE component, according to a gate switching sequence for all phases of the electric motor system in response to detecting the fault, sensing voltage and current values in the MDE component between switches of an inverter of the MDE component, and isolating the fault within the electric motor system based on the sensed voltage and current values.

A current sensor state determination device determines that an abnormality is caused in a current sensor when a sum of phase currents based on current detection values from each of the current sensors in three phases is greater than a first determination value, and determines that no abnormality is caused in the current sensor when the sum of phase currents is equal to or less than the first determination value. The state determination device determines that the current sensor is normal when it is determined that (i) no abnormality is caused in a preset electric angle range equal to or less than one electric-angle cycle of the rotating electric machine and (ii) a value of an electric current flowing in the rotating electric machine in a rotating coordinates system calculated based on the current detection value is equal to or greater than a second determination value.

A vehicle includes: at least one rotary electric machine; an inverter that drives the rotary electric machine; a capacitor connected between a paired electric power lines that is connected to the inverter; and a control unit. When a vehicle collision is detected, the control unit executes first control for discharging electric charges stored in the capacitor by performing a switching operation of the inverter so as to prevent a flow of a q-axis current but cause a flow of a d-axis current to the rotary electric machine. The control unit stops the first control in a specified case and executes second control for performing the switching operation of the inverter so as to reduce the current flowing through the rotary electric machine to be lower than that during execution of the first control. The control unit executes third control for shutting down the inverter after execution of the second control.

The electric motor control device includes a rotation angle correction amount calculation unit that, based on a rotation angle signal for an alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor, wherein the rotation angle correction amount calculation unit, based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor, calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount.

An over-current protection device for a power generator includes a first pin, configured to receive a signal; a detection and control module, coupled to the first pin, and configured to detect the signal to determine whether the signal conforms to a pre-determined condition or not, and to output a control signal when the signal conforms to the pre-determined condition; and an auto-trim and memory module, coupled to the detection and control module, and configured to receive the control signal from the detection and control module for executing corresponding auto-trim measurements and storing corresponding adjustment data.

A system that improves on known systems for reducing output torque by a motor in the event of a jam may include an electromechanical actuator (EMA), a motor configured to drive the EMA and a controller. The controller may be coupled to the motor and configured to receive a speed of the EMA and a position of the EMA. The controller may be further configured to determine whether a jam of the EMA is imminent or is occurring according to the EMA speed, EMA position, and a known range of motion of the EMA, and to provide an input signal to the motor to reduce a torque of the motor if a jam of the EMA is imminent or is occurring.

A drive circuit drives a power semiconductor element including a control terminal, a first main electrode, and a second main electrode. The drive circuit includes a first switching-off circuit and a second switching-off circuit each for turning off the power semiconductor element. The second switching-off circuit is lower in impedance than the first switching-off circuit. In a case where the power semiconductor element is turned off, only the first switching-off circuit operates when the power semiconductor element is in an unusual state, and the first switching-off circuit and the second switching-off circuit complementarily operate when the power semiconductor element is in a normal state.