Electric drives of escalators of subways are in the same row with the rolling stock by their purpose.
Reproducing machine drive loads in the testing and development of new systems requires special load devices. As a matter of principle, such devices should consist of a load machine and a controllable converter, allowing the load to be varied ...
Asynchronous electric drives of many machines and mechanisms of mining industry (for example, belt conveyors) operate with average load factor less than unity (0.4-0.6). Under these conditions, the weighted average power factor and efficiency of induction motors are much lower than the maximum possible values, resulting in poor motor utilization and excessive power consumption ...
