Abstract:
A two-phase switched reluctance motor (fig.4) with a pluraty of rotor poles (404) having asymmetric reluctance (405) about a central raidla axis of the respective rotor pole and a plurality of salient stator poles (402) having the same width as the rotor poles.
Abstract:
A two-phase switched reluctance motor (fig.4) with a pluraty of rotor poles (404) having asymmetric reluctance (405) about a central raidla axis of the respective rotor pole and a plurality of salient stator poles (402) having the same width as the rotor poles.
Abstract:
A rotor for an electrical motor (100) may include a plurality of salient radial field rotor poles (109) and a plurality of salient axial field rotor poles (110). The radial field rotor poles (109) and the axial field rotor poles (110) are respectively oriented on the rotor to receive or convey substantially perpendicular flux fileds. Additionally, the radial field rotor poles may include both inner and outer peripheral rotor poles (704, 704”) for communicating radial flux fields with separate coaxial stators (701, 705).
Abstract:
A nelectric vehicle driving system includes a power source (102), a voltage convertor (104), a control system (106) and one or more motors (110,112) for driving or propelling the vehicle. The voltage convertor is configured to accept an input voltage from the power source and generate an output voltage different from the input voltage. A switch (120) is provided to switch the delivery of power to the control system between the output of the power source and the output of the voltage convertor.
Abstract:
A driver circuit for driving an electrical motor coil is provided which comprises combined switched inductance boost voltage converter circuitry and switched inductance buck voltage converter circuitry. An input node of the driver circuit is provided to be coupled with the electrical motor coil, which provides the inductive element of both the boost and buck circuitry. Further the boost and buck circuitry share a storage capacitor, which provides the capacitive element of each circuitry, and a voltage developed across the storage capacitor by the boost circuitry forms an input of the switched inductance buck voltage converter circuitry. Bidirectional driving of the electrical motor coil is thus provided from a driver circuit which only need be supplied with a single unidirectional supply and the current drawn from that supply is significantly reduced because of the manner in which the boost and buck circuitry operate synergistically to recycle electrical power which is moved back and forth between the electrical motor coil and the storage capacitor. A corresponding driver board, electrical motor driver apparatus, method of operating a driver circuit and apparatus are also provided.
Abstract:
A motor control system (100) include an inverter (30) configured to convert boosted direct-current electric power output from a boost converter (20) to alternating-current electric power and supply the alternating-current electric power to an alternating current motor (40), and a control unit (60) configured to adjust boosted voltage of the boost converter (20). The control unit (60) includes an optimal boosted voltage map (67) which defines optimal boosted voltage for operating the alternating current motor (40) with a required number of revolutions and required torque, and a boosted voltage changing program (68) that sets boosted voltage (direct-current high voltage VH) of the boost converter (20) to a voltage which is higher than an optimal boosted voltage VHs when the carrier frequency Fc is a predetermined threshold value Fc0 or lower.
Abstract:
Embodiments of an integrated motor drive power electronics system are generally described herein. In some embodiments, the integrated motor drive power electronics system includes an active line filter (ALF) configured to control and regulate current drawn from an input power source and to attenuate current ripple fed back to the input power source, an energy storage capacitance coupled to an output of the active line filter, and a bidirectional low voltage power supply (LVPS). In some embodiments, the bidirectional LVPS may provide regulated power to a load and may selectively recycle power back to the input power source and regulate voltage at the load to a predetermined output voltage. In some embodiments, the energy storage capacitance may serve as a local input power source for higher power motor drive electronics and the bidirectional LVPS.
Abstract:
In some aspects, an actuation system includes an electrical positioning driver and an electrically-driven actuator. A voltage boost converter in the electrical positioning driver receives an input voltage. The voltage boost converter passes the input voltage to a voltage bus in the electrical positioning driver. The voltage on the voltage bus is converted to an actuator power signal that controls the electrically-driven actuator. The voltage boost converter boosts the voltage on the voltage bus to control a mechanical output performance of the electrically-driven actuator.