| 摘要 |
<p>PURPOSE:To facilitate regenerative and dynamic braking by a method wherein motors are divided into two groups, which are controlled respectively by two choppers Nos. 1 and 2 when the vehicle is on a power run and are controlled by diodes and a thyristor when the vehicle is put on the brake. CONSTITUTION:Motors 2 and 3 and a chopper 4, connected in series, are couple to a power supply 1. Diodes 6 and 7 are connected to the circuit with their polarity oriented as prescribed, and a thyristor 13 and a resistor 9 are connected to a chopper 5. Deceleration is first achieved by turning on and off the chopper 4. Then, with the choppers 4 and 5 and the thyristor 13 turned on simultaneously, current is repeatedly increased and then decreased by turning on and off the chopper 5. When the regenerative load has become light, the thyristor 13 is turned off and, when the choppers 4 and 5 are turned on and off, a regenerative-dynamic brake combination can be effected. This results in an extermely simplified circuit.</p> |
