Title:
COMMON COMBINATION STEP MULTIPLE VOLTAGE OPERATING CIRCUIT DEVICE
Document Type and Number:
Japanese Patent JPH09261852
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a common combination step multiple voltage operating circuit device which, being combined with semiconductor switches for controlling a rectification, has a capability to switch a plurality of voltages with a small loss and to output a pulse width modulated(PWM) voltage with a small loss by step rectification and which is simple-structured but can surely operate. SOLUTION: In stead of diodes, semiconductor switches SSU102, SSU103 are connected to battery units U1, U2 to let them perform a PWM operation. Diodes CR102, CR103 are necessary when the semiconductor switches are not inverse voltage protective type, In a range the output voltage is between zero and the unit voltage of the battery unit, a semiconductor switch SSU101 is opened and the semiconductor switches SSU102 and SSU103 perform a PWM operation. The battery units U1 and U2 are parallelly connected. Since shunted current is allowed to flow in each semiconductor switch, a voltage drop in the forward direction and a heat loss are lessened in each switch.
Inventors:
TAII HAA YAN
Application Number:
JP6812496A
Publication Date:
October 03, 1997
Filing Date:
March 25, 1996
Export Citation:
Assignee:
TAIIHAA YAN
International Classes:
H02J1/00; H02J7/00; H02J7/36; H02M3/158; (IPC1-7): H02J1/00; H02J1/00; H02J7/00
Attorney, Agent or Firm:
Hideo Dobashi (1 outside)