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METHOD AND APPARATUS TO MONITOR A RESOLVER

  • US 20170227567A1
  • Filed: 02/04/2016
  • Published: 08/10/2017
  • Est. Priority Date: 02/04/2016
  • Status: Active Application
First Claim
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1. A device for monitoring a resolver disposed on a rotatable member, comprising:

  • a controller including a microprocessor circuit and an interface circuit connected to the resolver, wherein the microprocessor circuit includes a dual-core central processing unit (CPU), a pulse generator, a sigma-delta analog-to-digital converter (SDADC), a global memory device, an internal communication bus and a direct memory access device (DMA);

    wherein the pulse generator is electrically connected to an excitation winding of the resolver;

    wherein the SDADC is electrically connected to secondary windings of the resolver;

    wherein the SDADC includes a memory buffer in communication with the communication bus;

    wherein the dual-core CPU includes a first CPU and a second CPU; and

    a clock synchronously controlling clock speeds of the SDADC, the pulse generator, the first CPU and the second CPU;

    wherein the microprocessor circuit is disposed to;

    control the pulse generator to generate an excitation pulse transferable to the excitation winding of the resolver,control the SDADC to capture data from the secondary windings of the resolver and store the captured data in the memory buffer,control the DMA to transfer the captured data from the memory buffer to the global memory device via the communication bus,execute a control routine to detect an envelope for the captured data, anddetermine a rotor position for the resolver based upon the detected envelope.

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