Elevator door machine control method

Abstract

The invention discloses an elevator door motor control method. The method comprises the following steps of regulating and limiting amplitude by using a speed ring PI (Proportional Integral) regulator via the difference between a given speed omegarr<*> and a feedback speed omegarr to generate a given torque Te<*>; calculating a feedback torque Te via a formula; comparing the difference deltaTe between the given torque Te<*> and the feedback torque Te with the tolerance epsilonT of a torque three-point hysteresis comparator to determine the comparator output tau and a voltage space vector acting on a three-phase full-bridge inverter in combination with a rotor sector determined by a rotor position thetar so as to drive a brushless direct current motor to perform corresponding actions. According to the method, the response speed of a system is rapider, three-phase voltage does not need to be sampled, a three-phase voltage sampling and conditioning circuit does not need to be set, and the use cost is reduced.

Description

technical field [0001] The invention relates to an elevator door machine control method, in particular to an elevator door machine control method based on a brushless DC motor. Background technique [0002] The whole system of the elevator door machine involves the integration of many disciplines, including mechanical engineering, electrical information, automatic control, etc. With the improvement of the quality of life of the people, on the basis of the safety and reliability of the elevator door machine, the requirements for the low cost, energy saving, environmental protection, and dynamic response speed of the elevator door machine are becoming more and more stringent. [0003] Traditional elevator door machine control methods based on brushless DC motors such as figure 1 As shown, it includes the following steps: [0004] (1) Calculate the feedback speed ω of the brushless DC motor through the three-phase Hall signal r and rotor position (rotor rotation angle) θ r ...

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Problems solved by technology

[0011] In the above elevator door machine control method, the feedback torque T e The calculation requires stator flux linkage Ψ in the two-phase stationary coordinate system α-β sα , Ψ sβ , Rotor flux linkage Ψ in the two-phase stationary coordinate system rα , Ψ rβ Observation, this will make the response time of the system relatively long, and it is necessary to set up a three-phase phase voltage sampling and conditioning circuit to sample the three-phase phase voltage Ua, Ub, Uc, which will lead to an increase in the hardware cost of the controller and reduce the inefficiency. Competitiveness of brushed DC motor door operator controllers in the current market

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