IMPEDANCE MEASURING METHOD FOR MULTIPLEX INVERTER

• Main Authors: KONISHI YOSHIHIRO, YODA KAZUYUKI
• Format: Patent
• Language: English
• Published: 19.05.1995
• Edition: 6
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

PURPOSE:To measure the impedance constant of the output power supply system of each parallel inverter in order to enhance the output voltage characteristics of a multiplex inverter system. CONSTITUTION:A difference 2DELTAVS set by a voltage difference setting circuit 21 is added to or subtracted from a value set by a voltage setter 10 for designating the output voltage of each parallel inverter constituting a multiplex inverter system thus setting a voltage difference of 2DELTA Vs between the output voltages of two arbitrary sets of inverters. The difference between the inverter output currents caused by the voltage difference is then detected in the form of a vector amount. Subsequently, a vector amount having the magnitude determined by dividing the voltage difference by the current difference and the phase angle equal to the phase difference between both differences is determined as the total impedance of respective inverter output supply paths for the basic wave of inverter output voltage.