Elevator staircase group frequency conversion drive united power supply energy-saving operation method and apparatus
A technology of variable frequency drive and operation method, which is applied in the deceleration device of AC motor, transportation and packaging, AC motor control and other directions, can solve the problems of energy waste, energy feedback device, high cost, power grid pollution, etc., and achieve obvious effect of energy saving.
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[0023]According to Figures 1-3, the working principle of the operating method of the present invention and the specific structure of the operating device are described in detail. The elevator escalator group variable frequency drive unified power supply and energy-saving operation method is to use the same AC / DC converter 2 that converts the AC power of the grid into a DC power. After it is connected in parallel with the braking unit 9, the DC power is connected through the common DC bus 7. Supply multiple DC / AC frequency converters 13 or 17 in elevators and escalator groups in a unified manner to control the motors 14 or 18 that drive the corresponding elevators and escalators 15 or 19 to operate. This method uses a common DC bus 7 to uniformly supply power to the variable frequency speed controllers 13, 17 and motors 14, 18 that control all elevators and escalators 14, 18 in the group, and thus form the energy exchange between the drive units in the group. aisle. Using this chan...
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