H - Electricity – 03 – K
Patent
H - Electricity
03
K
318/100, 323/9
H03K 17/687 (2006.01) F25B 49/00 (2006.01) H02P 6/08 (2006.01) H03K 17/567 (2006.01) H02M 7/5387 (2006.01)
Patent
CA 1299646
Docket 03-LO-6110 PATENT ELECTRONIC CONTROL CIRCUITS, ELECTRONICALLY COMMUTATED MOTOR SYSTEMS, SWITCHING REGULATOR POWER SUPPLIES, AND METHODS Abstract Electronic control circuit for use with electri- cal load powering apparatus having a load connection, a high voltage supply connection and a common, and with an electronic switch to switch the high voltage supply connec- tion to the load connection. The electronic switch has an input and is responsive to a voltage difference between the input and the load connection. The load connection is subject to high voltage excursions relative to the common due to the switching The electronic control circuit includes a transformer having a primary winding and a sec- ondary winding for providing at least one pulse output from the secondary winding, the transformer having an inherent interwinding capacitance between the primary winding and the secondary winding. A circuit connected to the second- ary winding couples the pulse output from the secondary winding between the input of the electronic means and the load connection when the pulse output is present. A high voltage excursion on the load connection charges the inher- ent interwinding capacitance to a high voltage level when the pulse output is present. The electronic control cir- cuit further includes circuitry for bypassing the high voltage level on the inherent interwinding capacitance of the transformer to the load connection when the pulse out- put and each high voltage excursion cease, including an active control circuit having an input and first and second control leads and a resistive path substantially free of inductance between the input of the active control circuit and the input of the electronic switch. The active control Docket 03-LO-6110 PATENT circuit thereby bypasses current from the input of the electronic switch to the load connection through the first and second control leads and the high voltage level is prevented from actuating the electronic switch when each high voltage excursion ceases, An electronically commu- tated motor system, a switching regulator power supply and methods of operation are also disclosed.
591266
Company General Electric
Craig Wilson And Company
LandOfFree
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