Abstract:
An apparatus is provided for controlling operation of an electric motor through use of an additional power storage arrangement connected across the DC busses of a motor drive and controlling the speed of the motor. The additional power storage arrangement includes an additional capacitor arrangement and a rate limiting arrangement in a series circuit relationship with one another.
Abstract:
An electrical controller for electric motors is provided. A control system for an electric motor comprises means for supplying excitation current to different windings of the motor at any given time. Furthermore, the amplitude of the excitation current is independently variable of the timing and duration of the application of the excitation current to the windings. This allows increased control of the motor and facilitates the operation of the motor at high mechanical and/or electrical speeds.
Abstract:
A system and method for driving an electric vehicle is provided. The system has, for example, a power source generating a voltage, a voltage converter, a control system, and one or more motors for driving or propelling the vehicle. The voltage converter is configured to accept an input voltage and generate an output voltage, which is different from the input voltage. The power source provides the input voltage to the voltage converter. A switch is further provided to switch the delivery of power to the control system between a power source voltage and an increased voltage derived from the voltage converter.
Abstract:
An electrical controller for electric motors is provided. A control system for an electric motor comprises means for supplying excitation current to different windings of the motor at any given time. Furthermore, the amplitude of the excitation current is independently variable of the timing and duration of the application of the excitation current to the windings. This allows increased control of the motor and facilitates the operation of the motor at high mechanical and/or electrical speeds.
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 fan having one fan blade; a fan motor for rotating the fan blade; a motor control electrically coupled with the fan motor for controlling operational characteristics of the fan motor; and a power supply having a step-down high efficiency buck converter, a step-down low drop-out linear regulator, and/or a step-down switching regulator are described. The power supply may receive a first input voltage and lower the first input voltage to a second lower voltage. The fan motor is electrically coupled to be driven by the first input voltage and the motor control is electrically coupled to operate using the second lower voltage from the power supply. The motor control may include a microcontroller, level shifters electrically coupled to the microcontroller, and drivers electrically coupled to the level shifters and configured to drive the fan motor.
Abstract:
An apparatus is provided for controlling operation of an electric motor through use of an additional power storage arrangement connected across the DC busses of a motor drive and controlling the speed of the motor. The additional power storage arrangement includes an additional capacitor arrangement and a rate limiting arrangement in a series circuit relationship with one another.
Abstract:
Sicherungsschaltung für eine Gleichspannungsanlage speisende Stromversorgung, bei der erfindungsgemäss vorgeschlagen wird, dass sie am Ausgang der Stromversorgung angeordnet ist, und zwischen der positiven Stromversorgungsklemme (3) und der positiven Ausgangsklemme (1) zur Gleichspannungsanlage ein Schaltelement (S1), sowie eine zwischen dem Schaltelement (S1) und der positiven Ausgangsklemme (1) geschaltene Drossel (L1) vorgesehen ist, wobei die Drossel (L1) an ihrer mit der positiven Ausgangsklemme (1) verbundenen Seite an einen Ausgangskondensator (C2), und die mit dem Schaltelement (S1) verbundene Seite der Drossel (L1) an die Kathodenseite einer parallel zum Ausgangskondensator (C2) geschaltenen Diode (D1) geschalten ist, sowie eine Steuerung für das Schaltelement (S1) vorgesehen ist, die das Schaltelement (S1) in Abhängigkeit vom in der Sicherungsschaltung gemessenen Strom schaltet.