An interleaved bridgeless power factor correction (PFC) converter-based motor drive system is provided. The system includes a first inductor coupled to a second inductor. The coupled first and second inductors are coupled to a first input configured to be coupled to a first line of an alternating current (AC) power supply. The system also includes a third inductor coupled to a fourth inductor. The coupled third and fourth inductors are coupled to a second input configured to be coupled to a second line of the AC power supply. The system further includes a digital active power factor correction (PFC) controller configured to cause current in at least one of the coupled first and second inductors and the coupled third and fourth inductors to be interleaved.

A camera module includes a lens, a first magnet and a second magnet mounted on a mobile body including the lens, a coil portion arranged near the first magnet and configured to move the first magnet in a first direction, and the magnetic sensor arranged near the second magnet and configured to detect the position of the second magnet in the first direction as a detection direction.

AC and DC brushless motor for the fan, comprising a brushless motor; and an active power adjustment mechanism, disposed within the brushless motor and comprising an EMI filtering and rectifying unit, a prior driving unit connected to the EMI filtering and rectifying unit, a motor driving unit connected to the brushless motor, a constant current unit connected to the EMI filtering and rectifying unit and the prior driving unit, a protective compensation unit connected to the prior driving unit and the constant current unit, a motor controlling unit connected to the motor driving unit, and a sensing unit connected to the motor controlling unit.

A control device for a ceiling fan may have a motor drive circuit configured to control a rotational speed of a motor of the ceiling fan, an occupancy sensing circuit, and a control circuit configured to adjust the rotational speed of the motor in response to a detected occupancy or vacancy condition. The control circuit may process the signals generated by the occupancy sensing circuit to eliminate the effects of vibrations and/or wobbling of the ceiling fan. The control circuit may control the motor drive circuit to adjust the rotational speed of the motor in response to an accelerometer to minimize the magnitude of the wobble of the ceiling fan. The control circuit may be configured to learn a preferred rotational speed for the motor. The control circuit may also be configured to control the rotational speed of the motor to affect a thermal comfort level of an occupant.

An electric motor controller and methods of determining which input power line of a plurality of input power lines of a motor drive controller has been energized are provided. An electric motor controller configured to be coupled to an electric motor includes a plurality of power input lines configured to receive an alternating current (AC) input voltage from an AC power source, an energized line detection device configured to sense that a power input line has been energized by the AC power source, and configured to output an isolated signal, and a rectifier configured to convert the AC input voltage having a frequency to a direct current (DC) voltage. The controller also includes a computing device coupled downstream from the energized line detection device and configured to determine which input power line has been energized.

A control system for an electric motor comprising a stator having a plurality of stator coils and a rotor movable along the stator comprises a position detection device and a coil monitoring device. In this case, the position detection device is designed to generate position data representing a position of the rotor along the stator, and the coil monitoring device is designed to generate coil data representing a status of one or a plurality of the stator coils. The control system furthermore comprises a safety device designed to carry out a coordination between the coil data and the position data. Moreover, the safety device is designed to cause the electric motor to be transferred to a safe state if an error has been discovered during the coordination.

A motor driving apparatus is disclosed, which stops driving a motor in a normal operation state and a start state. The motor driving apparatus adjusts a corresponding switch according to a pulse width modulation (PWM) table, to gradually increase a duty cycle of turning-on the corresponding switch. The PWM table indicates a relationship between a parameter and the duty cycle. The duty cycle increases with the monotone variation of the parameter. Accordingly, the motor driving apparatus can rapidly stop the operation of the motor, to avoid that the motor driving apparatus breaking down or the motor generating noise.

A connector structure that is joined to a housing so as to form the control unit includes a connector main body in which a connector is formed, a terminal including a power supply system and a signal system, and a component mounting portion including at least one of a capacitor and a coil, wherein the component mounting portion is provided parallel to a motor output shaft on the exterior of a motor or the housing, and the at least one of the capacitor and the coil included in the component mounting portion is electrically connected directly to the connector of the connector main body via the terminal.

A device comprises a motor/generator having an air gap and a plurality of windings, a plurality of power converter groups, and a control system. The windings are so configured that the number of phases in a pair of poles and the number of poles of the motor/generator can be dynamically adjusted. The power converter group comprises a plurality of power converters which is coupled between an input voltage source and a plurality of windings for controlling currents in the windings. The control system is so configured such that the number of poles of the motor/generator and the number of phases in a pair of poles are dynamically adjusted, and a synchronous speed of a moving magnetic field generated by winding currents within first pair of poles is approximately equal to a synchronous speed of a second moving magnetic field generated by currents in the windings within second pair of poles.

The invention relates to a power module (9) for converting an electric current flowing between an accumulator and an alternating-current motor, said module (9) comprising switching means (10) that can be controlled to authorize the powering of the motor and/or the charging of the accumulator, and an intrinsic control unit (13) connected to said switching means (10) and capable of delivering opening and/or closing signals to said switching means (10), said intrinsic control unit (13) being further capable of exchanging data with a remote control unit, with a potential barrier.