US 9,812,981 B2
Variable coil configuration system, apparatus and method
Jonathan Gale Ritchey, Vernon (CA); Mitchell Gordon Burton, Vancouver (CA); and Ryan Biffard, Calgary (CA)
Assigned to Exro Technologies Inc., West Vancouver (CA)
Filed by EXRO TECHNOLOGIES INC., West Vancouver (CA)
Filed on Jun. 3, 2014, as Appl. No. 14/295,069.
Application 14/295,069 is a continuation of application No. 13/393,749, abandoned, previously published as PCT/US2010/047750, filed on Sep. 2, 2010.
Claims priority of provisional application 61/239,769, filed on Sep. 3, 2009.
Prior Publication US 2014/0347903 A1, Nov. 27, 2014
Int. Cl. H02M 7/06 (2006.01); H02P 29/032 (2016.01); H02P 9/02 (2006.01); H02P 25/18 (2006.01)
CPC H02M 7/06 (2013.01) [H02P 9/02 (2013.01); H02P 25/18 (2013.01); H02P 25/188 (2013.01); H02P 29/032 (2016.02)] 22 Claims
OG exemplary drawing
 
1. A variable coil configuration system, comprising:
a plurality of bridge rectifiers, the bridge rectifiers each having a pair of AC nodes on an AC side of the respective bridge rectifier and a pair of DC nodes on a DC side of the respective bridge rectifier, wherein the pair of AC nodes for each bridge rectifier in the plurality of bridge rectifiers is electrically connectable to a coil of an electric machine;
a first number of switches, each of the switches of the first number of switches on the AC side of a respective one of the bridge rectifiers, wherein each switch in the first number of switches is electrically connectable between two coils in the electric machine such that, in operation, for each of the switches electrically connected between two coils in the electric machine, the bridge rectifiers couple the two coils electrically in parallel with one another when the switch is open and the two coils are not subject to an open circuit condition, a low voltage condition or a short circuit condition, and the switch selectively electrically couples the two coils in series with one another when the switch is closed; and
a second number of switches, each of the switches of the second number of switches electrically connected in parallel with respective ones of the first number of switches, wherein the switches of the first number of switches are faster acting than the switches of the second number of switches and the switches of the second number of switches have a lower associated electrical loss than an electrical loss associated with the switches of the first number of switches.