Motor assembly for driving a pump with a matrix converter
AssigneeVidar Corporation
InventorDean P. Williams
Life of this patent
Estimating the term…
Abstract
A resistor assembly for a motor drive circuit for an electric motor assembly can have a generally circular shape. The resistor assembly includes a resistor with input and output connectors and a pair of conductor elements extending from the input and output connectors. The pair of conductor elements extend adjacent each other along a curved serpentine path so the resistor has a generally circular outer perimeter and a generally circular inner perimeter. The curved serpentine path of the pair of conductor elements allows current to flow through the pair of conductor elements so that magnetic fields generated by the current flow through the pair of conductor elements cancel each other, thereby providing the resistor with low inductance.
Claims20
A matrix converter configured as a motor drive circuit of an electric motor, the matrix converter comprising:
- an array of switches including a plurality of AC inputs configured to receive a multi-phase AC input voltage and a plurality of AC outputs configured to output a multi-phase AC output voltage;
- control circuitry configured to control the array of switches to synthesize the multi-phase AC output voltage from the multi-phase AC input voltage;
- and
- a clamp circuit electrically connected between the plurality of AC inputs and the plurality of AC outputs, the clamp circuit including a switched mode power supply operable to generate a DC supply voltage for the control circuitry.
A method of supplying DC power in a matrix converter, the method comprising:
- controlling an array of switches using control circuitry to synthesize a multi-phase AC output voltage from a multi-phase AC input voltage;
- activating a clamp circuit connected between a plurality of AC outputs and a plurality of AC inputs of the array of switches in response to an overvoltage condition;
- and
- generating a DC supply voltage for the control circuitry using a switched mode power supply of the clamp circuit.
A matrix converter comprising:
- a switch array having a plurality of AC inputs and a plurality of AC outputs, the switch array comprising a plurality of bidirectional switches;
- a plurality of driver circuits each configured to control a respective one of the plurality of bidirectional switches;
- a control circuit configured to provide a plurality of input signals to the plurality of driver circuits;
- and
- a clamp circuit electrically connected between the plurality of AC inputs and the plurality of AC outputs, the clamp circuit including a switched mode power supply operable to generate a DC supply voltage for the control circuit.
Dependencies are inferred from the claim text.