Abstract:
An electric motor driving device that drives an electric motor including a field winding, a rotor and a stator, wherein the rotor and the stator each foam a field pole by passing a field current through the field winding, includes: a power supply device; a converter including a reactor that at least partially serves as the field winding shared with the electric motor, and configured to receive a voltage from the power supply device to carry out voltage conversion between first and second power lines and to pass the field current through the field winding during voltage conversion operation; an inverter configured to convert a direct-current power received from the converter to an alternating-current power for driving the electric motor; and a controller controlling the converter so that a current flows through the field winding in the same direction both during power running and regeneration of the electric motor.
Abstract:
A motor driving system includes a power supply, a driver, a motor, and a control unit. The driver includes a driving module and a power converting module. The driving module is connected to the power supply. The power converting module is connected to the power supply. The motor includes a power terminal connected to the power converting module. The control unit is connected to the power converting module. The power supply is configured to provide power for the driver. The driving module is configured to control the motor. The control unit is configured to control the power converting module to output a changeable voltage to the motor.
Abstract:
A type of portable chargers with power factor correction capability for use with electric vehicles comprises of a filtering rectifier module, an integrated circuit power supply module, a DC-DC PFC module and a DC-DC BUCK module. The filtering rectifier module has one input port and two output ports. The IC power supply module has one input port and two output ports. The DC-DC PFC module has two input ports and one output port. The DC-DC BUCK module has two input ports and one output port. The two output ports of the filtering rectifier module are connected to the input port of IC power supply module and the input port of the DC-DC PFC module respectively. The output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module. The two output ports of IC power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module. This new type of portable chargers embodied with this invention can effectively reduce reactive power in the power system and develop greater power.
Abstract:
A power device for use in a vehicle includes a housing, a voltage converter, and a charge-storing device. The housing carries the voltage converter and the charge-storing device. The voltage converter includes a circuit that converts a power signal having a first voltage level to a second voltage level. The charge-storing device electrically couples with the voltage converter and stores the power signal having the second voltage level.
Abstract:
A type of portable chargers with power factor correction capability for use with electric vehicles comprises of a filtering rectifier module, an integrated circuit power supply module, a DC-DC PFC module and a DC-DC BUCK module. The filtering rectifier module has one input port and two output ports. The IC power supply module has one input port and two output ports. The DC-DC PFC module has two input ports and one output port. The DC-DC BUCK module has two input ports and one output port. The two output ports of the filtering rectifier module are connected to the input port of IC power supply module and the input port of the DC-DC PFC module respectively. The output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module. The two output ports of IC power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module. This new type of portable chargers embodied with this invention can effectively reduce reactive power in the power system and develop greater power.
Abstract:
An electric motor drive controller for an electric vehicle driven by a motor with permanent excitation and powered by an energy source comprises: a power control stage coupleable to the motor for generating a drive signal at a voltage to control the motor at a desired speed; a voltage control circuit connectable between the energy source and the power control stage for controlling the voltage of the drive signal at a first voltage potential in one operating mode and at a voltage potential greater than the first voltage potential in another operating mode; and a mode controller for controlling the operating modes of the voltage control circuit based on properties of the drive signal.
Abstract:
A driving apparatus of a three-phase induction motor includes: a three-phase power supply unit for supplying three-phase power; a rectifier for rectifying the three phase voltage supplied from the three phase power supply unit; a voltage reducing unit for reducing a DC voltage generated from the rectifier and outputting a stabilized DC voltage; and an inverter unit for varying the DC voltage outputted from the voltage reducing unit to a three-phase AC voltage and driving a three-phase induction motor. A power-factor degradation generated during supplying a DC voltage to the inverter to drive the three-phase induction motor is prevented, a harmonic wave is removed, and because a high-priced inverter component is not necessary, its relevant expense is reduced.
Abstract:
A loss in each of a converter, an inverter, and a motor changes according to operation based on the rotation speed of the motor or the like. Thus, in order to efficiently perform operation, appropriate control needs to be performed according to the voltage of a DC power supply and operation of the motor. The present disclosure is characterized by including a controller which controls a switching element of a converter according to the torque and the rotation speed of a motor on the basis of a loss in at least one of the motor, an inverter, and the converter.
Abstract:
Systems and methods are provided for a soft switching topology for a direct current (DC)-DC converter. The systems and methods determine an operational status of an electric motor, and activate at least one of an upper or lower first or second semiconductor switches based on an operation of the electric motor. The first and second switching circuits are conductively coupled to a power inverter circuit. The systems and methods include deliver an adjusted voltage to one of the power inverter circuit or a power circuit based on the operational status of the electric motor.
Abstract:
A method for controlling a trolling motor including a sonar transducer and an electric motor rotating a propeller includes providing a motor controller configured for electrical connection to the electric motor. The motor controller includes a pulse width modulator outputting a PWM signal. A high-side electronic switch is provided between a high-side output of the pulse width modulator and the electric motor and a low-side electronic switch is provided between a low-side output of the pulse width modulator and the electric motor. The electric motor is driven by current transmitted via the high-side electronic switch or the low-side electronic switch in response to the PWM signal. An operating frequency of the PWM signal is selected such that an operating frequency of the sonar transducer is approximately centered between harmonic frequencies of the PWM signal. A spread spectrum switching algorithm reduces a peak noise level of the PWM signal.