Elevator Control
An elevator control device, motor technology, applied in the direction of AC motor control, control system, electrical components, etc.
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Embodiment 1
[0053] like figure 1 As shown, the elevator control device includes a second contactor 20 , a frequency converter 11 , a motor 12 , a DC converter 21 , a buffer capacitor 22 and an accumulator 23 .
[0054]The frequency converter 11 includes a rectifier 111 and an inverter 112, which are used to supply power to the motor 12 and drive the motor to run;
[0055] The input terminal of the rectifier 111 is connected to an external AC power supply, and the output DC voltage is sent to the input terminal of the inverter 112;
[0056] The inverter 112 inverts the DC voltage at its input terminal into an AC voltage to supply power to the motor 12;
[0057] The high voltage terminal of the DC converter 21 is connected to the input terminal of the inverter 112;
[0058] The second contactor 20 is connected between the low-voltage end of the DC converter 21 and the accumulator 23;
[0059] The buffer capacitor 22 is arranged between the DC converter 21 and the second contactor 20 , a...
Embodiment 2
[0065] Based on the elevator control device of Embodiment 1, such as figure 2 As shown, the DC converter 21 includes two power switch tubes 211, two diodes 212 and a built-in inductor 210;
[0066] The power switch tube 211 includes a control terminal, a first terminal and a second terminal, and the conduction or cutoff between the first terminal and the second terminal is controlled by a voltage signal applied at the control terminal;
[0067] The first end of the first power switch tube 211 is connected to the positive input end of the inverter 112;
[0068] The second end of the first power switch tube 211 is connected to the first end of the second power switch tube 211;
[0069] The second terminal of the second power switch tube 211 is connected to the negative input terminal of the inverter 112;
[0070] The negative terminal of the first diode 212 is connected to the positive input terminal of the inverter 112;
[0071] The negative end of the second diode 212 is co...
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