Controller and associated drive assembly controlling a brushless direct current motor
First Claim
1. A controller for controlling a brushless direct current (BLDC) motor, wherein the BLDC motor includes a predetermined number of phase windings, said controller comprising:
- a drive assembly in electrical communication with a power supply and the BLDC motor, wherein said drive assembly is capable of receiving a voltage output of the power supply and is capable of providing a pulse-width-modulated input voltage to the BLDC motor, wherein said drive assembly comprises a plurality of half-bridge assemblies that each include two switching elements that are each capable of operating at no more than a predetermined frequency, wherein at least two half-bridge assemblies are electrically connected to each phase winding of the BLDC motor such that the at least two half-bridge assemblies are capable of providing the pulse-width-modulated input voltage to the respective phase winding of the BLDC motor at a frequency higher than the predetermined frequency; and
a processing element in electrical communication with said drive assembly and the BLDC motor wherein said processing element is capable of controlling operation of the drive assembly.
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Accused Products
Abstract
A controller for controlling a BLDC motor controller includes a drive assembly, and a processing element. The processing element is in electrical communication with the drive assembly and the BLDC motor, and the processing element is capable of controlling operation of the drive assembly. The drive assembly, is in electrical communication with a power supply and the BLDC motor. The drive assembly includes a plurality of half-bridge assemblies that each include two switching elements, such as insulated gate bipolar transistors (IGBT'"'"'s), that are each capable of operating at no more than a predetermined frequency. In this regard, at least two half-bridge assemblies are electrically connected to each phase winding of the BLDC motor such that the half-bridge assemblies are capable of providing the pulse-width-modulated input voltage to the respective phase winding of the BLDC motor at a frequency higher than the predetermined frequency.
22 Citations
14 Claims
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1. A controller for controlling a brushless direct current (BLDC) motor, wherein the BLDC motor includes a predetermined number of phase windings, said controller comprising:
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a drive assembly in electrical communication with a power supply and the BLDC motor, wherein said drive assembly is capable of receiving a voltage output of the power supply and is capable of providing a pulse-width-modulated input voltage to the BLDC motor, wherein said drive assembly comprises a plurality of half-bridge assemblies that each include two switching elements that are each capable of operating at no more than a predetermined frequency, wherein at least two half-bridge assemblies are electrically connected to each phase winding of the BLDC motor such that the at least two half-bridge assemblies are capable of providing the pulse-width-modulated input voltage to the respective phase winding of the BLDC motor at a frequency higher than the predetermined frequency; and
a processing element in electrical communication with said drive assembly and the BLDC motor wherein said processing element is capable of controlling operation of the drive assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. A drive assembly for providing a pulse-width-modulated input voltage to a brushless direct current (BLDC) motor, wherein said drive assembly comprises a plurality of half-bridge assemblies that each include two switching elements that are each capable of operating at no more than a predetermined frequency, wherein at least two half-bridge assemblies are electrically connected to each phase winding of the BLDC motor such that the at least two half-bridge assemblies are capable of providing a pulse-width-modulated input voltage to the respective phase winding of the BLDC motor at a frequency higher than the predetermined frequency.
Specification