| 摘要 |
PURPOSE:To extremely easily calculate a circuit constant of a d.c. motor with the use of only data held by a Leonard device by measuring an averaged d.c. voltage, a current, a d.c. current peak value, a gate ignition angle and a power source voltage in a boundary condition in which the d.c. current is shifted from an interrupted condition into a continuous condition. CONSTITUTION:When a d.c. current increases so as to detect a d.c. current which is shifted into a continuous condition, a data pick-up part 2 reads data such as an averaged d.c. current peak value Ip, a gate ignition angle theta and a power source voltage Vi. An armature resistance calculating part 3 and an armature reactance calculating part 4 calculate circuit constants from the data. That is, the armature resistance calculating part 3 calculates an armature resistance Ra=Vav/Iav from the averaged d.c. voltage Vav and the averaged d.c. current Iav. The armature reactance calculating part 4 calculates an armature reactance La=VT/Ip from a product VT of a voltage and a time and the d.c. current peak value Ip. |
