An apparatus for controlling an inverter is disclosed. The apparatus for controlling the inverter contained in an inverter system configured to drive a motor determines a slip frequency to be used for compensation of a frequency of a first reference voltage, not only using a first reference voltage (including an amplitude and frequency) of the first reference voltage applied to the inverter, but also using an output current of the motor or a rotor speed of the motor. The apparatus determines not only a frequency of a second reference voltage obtained by compensation of the slip frequency, but also an amplitude of the second reference voltage corresponding to the frequency of the second reference voltage.

Various embodiments include a variable frequency drive motor control apparatus. The apparatus includes a main controller having a first interface. A motor controller is coupled to and controls an electric motor, the motor controller further coupled to the main controller. A network switch is coupled to the main controller, the motor controller, and a remote controller over respective digital connections. The remote controller has a second interface. The network switches data between the first interface, the second interface, and the motor controller. A network coupler is coupled between a variable frequency drive controller and the motor controller.

An apparatus and method for extending component life in a motor drive having a stator heating mode is disclosed. The current supplied to stator windings is cycled through a set of primary stator power transistors to increase the overall lifespan of the drive, thus preventing premature failure of the stator power transistors by splitting the workload between them, rather than having a single transistor supply the bulk of the stator heating current.

According to at least some embodiments, a method for driving a motor includes, upon a restart of the motor, determining whether the rotor is rotating based on a signal generated from outputs of at most one Hall sensor. The method further includes, if it is determined that the rotor is rotating, determining a plurality of output duty values for driving a plurality of windings of the motor. The method further includes generating a drive signal for driving the motor based on the determined plurality of output duty values.

One or more example embodiments provide systems and methods for using impedance separation and impedance shaping.

An example system includes a first surge protection module configured to receive a command signal: a motor control module configured to receive: (i) the command signal from the first surge protection module, and (ii) an enable signal, wherein the motor control module provides a control signal in response to the enable signal meeting a threshold value: a motor configured to receive the control signal from the motor control module: a switch coupled to the motor and configured to be triggered based on a state of the motor, wherein the switch comprises: (i) a first terminal configured to provide an indication signal of the state of the motor and provide the enable signal to the motor control module, and (ii) a second terminal connected to ground; and a second surge protection module coupled to the first terminal of the switch.

In a motor driving system, a motor driving system is provided which simplifies the system by ceasing ON/OFF control of a commercial driving command, and by performing commercial synchronous transfer and capture control based on a drive speed reference. A system controller performs synchronization control so as to make a drive output coincident with a phase/amplitude of a commercial AC power source when a rotation speed of a motor exceeds a drive speed reference n2, and when a prescribed requirement is satisfied, the commercial AC power source is synchronously transferred, and the motor is driven by the commercial AC power source. In addition, when the drive speed reference is set to n1, and a drive output side switch is closed, the drive output is connected to the commercial AC power source, and when a prescribed requirement is satisfied, the motor is started to be driven at a variable speed (t7), and thereby the synchronous capture is performed.

A cooling fan control system is provided. The system includes a sensor unit that includes a temperature sensor that generates a first output value corresponding to a coolant temperature and an air-conditioner pressure transducer that generates a second output value corresponding to an air-conditioner pressure and a cooling control portion. The cooling control portion generates a control condition based on the first output value and the second output value and adjusts a rotation speed of a cooling motor based on the control condition. The control condition includes a target control condition formed as a region including a cross point of the first output value and the second output value. The cooling control portion adjusts the rotation speed of the cooling motor to cause the first output value and the second output value to correspond to the target control condition.

A vehicle window control system is disclosed. The system comprises a window positioning device and a controller in communication with a mobile device. The controller is configured to identify a distance of the mobile device from the vehicle. In response to the distance being less than a distance threshold, the controller is configured to control the positioning device in a first mode. In response to the distance being greater than the distance threshold, the controller is configured to control the positioning device in a second mode.

A method of preventing a windshield wiper from freezing to a windshield of a vehicle is provided. The method broadly includes the steps of: (a) receiving information relating to an ambient condition of the vehicle; (b) switching power to a motor for driving the windshield wiper in a first direction if the received information indicates an adverse ambient condition of the vehicle; (c) sensing current drawn by the motor; (d) comparing an initial sensed current drawn by the motor when power is initially switched to the motor to a subsequent sensed current drawn by the motor a period after power is initially switched to the motor; and (e) periodically reversing the motor for driving the windshield wiper in a second direction or the first direction until the subsequent sensed current is less than the initial sensed current.