US 9,812,943 B2
Resonant load power conversion device and time division operation method for resonant load power conversion device
Yasuhiro Kondo, Numazu (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 15/318,796
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Jun. 17, 2015, PCT No. PCT/JP2015/067430
§ 371(c)(1), (2) Date Dec. 14, 2016,
PCT Pub. No. WO2015/194585, PCT Pub. Date Dec. 23, 2015.
Claims priority of application No. 2014-124135 (JP), filed on Jun. 17, 2014.
Prior Publication US 2017/0133920 A1, May 11, 2017
Int. Cl. H02M 1/00 (2006.01); H02M 1/088 (2006.01); H02M 7/537 (2006.01)
CPC H02M 1/088 (2013.01) [H02M 7/537 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A resonant load power conversion apparatus including a single-phase inverter having a dc input side to be connected with a dc voltage source and an output side to be connected with a resonant load and outputting a rectangular wave voltage with a resonance frequency, the resonant load power conversion apparatus comprising:
switch group circuits which are connected, respectively, with upper and lower arms of a first phase of the single-phase inverter and upper and lower arms of a second phase of the single-phase inverter, each of the switch group circuits including N series combinations, N being a number of the series combinations (N is an integer equal to or greater than 2), each of the series combinations being a series combination of M switching devices, M being a number of the switching devices (M is an integer equal to or greater than 2), the N series combinations being connected in parallel with each other by main circuit conductors; and
a control section configured to control each of the switching devices of the switch group circuits of the single-phase inverter cyclically in an ON state for an ON period equaling (M×N+1) clocks and in an OFF state for an OFF period equaling (M×N−1) clocks in each cycle of a cycle period equaling to (2×M×N) clocks, in a switching pattern to turn on each of the series combinations in a manner of time division by 1/(M×N).