CN203359738U - Elevator door motor control system - Google Patents

Abstract

The utility model discloses an elevator door motor control system. The elevator door motor control system comprises a DSP (Digital Signal Processing) smallest system as well as a bridge rectifier circuit, a wave-filtration and overcurrent-protection circuit, a three-phase full-bridge inverter circuit and a brushless direct-current motor which are electrically connected in sequence, wherein an EPWM (Enhanced Pulse Width Modulation) output interface of the DSP smallest system is electrically connected with the three-phase full-bridge inverter circuit through a PWM (Pulse Width Modulation) signal isolation phase inverting circuit; the wave-filtration and overcurrent-protection circuit is electrically connected with an external interrupt interface of the DSP smallest system through an over-voltage and under-voltage protection circuit. The elevator door motor control system also comprises a current sampling-conditioning circuit and a HALL signal sampling-conditioning circuit, wherein the current sampling-conditioning circuit is electrically connected with the DSP smallest system and is used for sampling two-phase currents of the brushless direct-current motor, and the HALL signal sampling-conditioning circuit is electrically connected with the DSP smallest system and is used for sampling HALL signals of the brushless direct-current motor. The elevator door motor control system is low in energy consumption and has an energy-saving effect and a high power utilization rate.

Description

Elevator Door Control System

Technical field

The utility model relates to a kind of Elevator Door Control System.

Background technology

The elevator door-motor whole system relates to the blending of a plurality of subjects, comprise mechanical engineering, electric information, automatic control etc., action parts the most frequently in lift facility, its performance characteristic directly has influence on rapidity and the reliability of running process of elevator, raising along with lives of the people quality, at elevator door-motor on safe and reliable basis, low cost, energy-saving and environmental protection, the dynamic responding speed of elevator door-motor required to more gradually harshness.

Door machine control system in the market generally adopts synchronous dynamo or Induction Motor-Driven, the energy consumption of synchronous dynamo or asynchronous dynamo is higher, the power utilization rate is lower, also just make that current door machine control system energy consumption is higher, the power utilization rate is lower, makes use cost higher.

The utility model content

Technical problem to be solved in the utility model is that the Elevator Door Control System that energy consumption is lower, comparatively energy-conservation, the power utilization rate is higher is provided.

For solving the problems of the technologies described above, the Elevator Door Control System that the utility model provides, it comprises the DSP minimum system, the bridge rectifier circuit be electrically connected to successively, filtering and current foldback circuit, three phase full bridge inverter circuit and motor, the EPWM output interface of DSP minimum system is isolated negative circuit by pwm signal and is electrically connected to the three phase full bridge inverter circuit, filtering and current foldback circuit are electrically connected to the external interrupt interface of DSP minimum system by the over-and under-voltage protective circuit, it is characterized in that: described motor is brshless DC motor, described Elevator Door Control System also comprises the current sample modulate circuit of the biphase current for the brshless DC motor of sampling be electrically connected to the DSP minimum system, the hall signal sampling modulate circuit of the hall signal for the brshless DC motor of sampling be electrically connected to the DSP minimum system.

After adopting above structure, the utility model compared with prior art, has advantages of following:

Because the utility model Elevator Door Control System has adopted brshless DC motor, brshless DC motor is than synchronous dynamo and asynchronous dynamo, its energy consumption is lower, comparatively energy-conservation, and the power utilization rate is higher, make that the utility model Elevator Door Control System energy consumption is lower, comparatively energy-conservation, the power utilization rate is higher, make the use cost of this Elevator Door Control System lower.

As improvement, the serial parallel communication interface of described DSP minimum system is electrically connected with liquid crystal drive and driven in series circuit.Connect by liquid crystal display drive circuit every data that display equipment can monitor this Elevator Door Control System, connecting notebook by the driven in series circuit can conveniently be debugged this Elevator Door Control System.

The accompanying drawing explanation

Fig. 1 is the schematic circuit diagram of the utility model Elevator Door Control System;

Fig. 2 is the software flow pattern of the utility model Elevator Door Control System.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.

As shown in Figure 1, the utility model Elevator Door Control System comprises the DSP minimum system, the bridge rectifier circuit be electrically connected to successively, filtering and current foldback circuit, three phase full bridge inverter circuit and brshless DC motor, the EPWM output interface of DSP minimum system is isolated negative circuit by pwm signal and is electrically connected to the three phase full bridge inverter circuit, filtering and current foldback circuit are electrically connected to the external interrupt interface of DSP minimum system by the over-and under-voltage protective circuit, described Elevator Door Control System also comprises the current sample modulate circuit of the biphase current for the brshless DC motor of sampling be electrically connected to the DSP minimum system, the hall signal sampling modulate circuit of the hall signal for the brshless DC motor of sampling be electrically connected to the DSP minimum system, described Elevator Door Control System also comprises the switching power circuit be electrically connected to each modular circuit power unit, provide ± 24V of switching power circuit, ± 15V, the 5V power supply, the IO interface of DSP minimum system also is electrically connected with 24V level imput output circuit, by 24V level imput output circuit, make control system receive the instruction OP that opens the door, instruction CL closes the door, deceleration instruction OP_DEC opens the door, deceleration instruction CL_DEC closes the door, signal LIM and fire-fighting signal ENI put in place, it is worth mentioning that, the signal that puts in place only needs a photoelectric switch, door machine switch gate can make photoelectric switch send signal, can be to the electrical level polar change of this model by the software setting, and traditional door machine controller needs two location switches, cost-saving, by 24V level imput output circuit control system is sent open the signal that puts in place, the door-closing in-place signal, self-defined multi-functional output Y1, self-defined multi-functional output Y2, with door machine controller spurious signal.

The serial parallel communication interface of described DSP minimum system is electrically connected with liquid crystal drive and driven in series circuit.

Principle of work of the present utility model is as follows: (1), to Elevator Door Control System access civil power, produce direct current (DC) so that brshless DC motor energising work through rectifier bridge, calculate the feedback speed ω of brshless DC motor by the three-phase hall signal _rand rotor position _r, then by rotor position _rdetermine the given speed ω of motor _r ^*, given speed ω _r ^*with feedback speed ω _rdifference through the speed ring pi regulator, regulate and amplitude limit produces given torque T _e ^*;

(2), the two-phase phase current I of sampling brshless DC motor _a, I _band calculate another phase current I _c, and calculate feedback torque by following formula:

$T_e=\frac{K[E_a\left({\mathrm{\θ}}_r\right)I_a+E_b\left({\mathrm{\θ}}_r\right)I_b+E_c\left({\mathrm{\θ}}_r\right)I_c]*n}{\mathrm{\Ω}}$

Wherein, K is back emf coefficient, E _a(θ _r), E _b(θ _r), E _c(θ _r) be counter potential trapezoidal wave function, n is the brushless DC motor rotor rotating speed, Ω is brshless DC motor mechanical angle speed;

(3), by given torque T _e ^*with feedback torque T _edifference DELTA T _etolerance ε with torque bikini hysteresis comparator _tcompare and determine comparator output τ, and then in conjunction with rotor position _rdetermined rotor sections is determined the space vector of voltage that acts on three-phase full-bridge inverter, makes brshless DC motor carry out corresponding action.

Fig. 2 also discloses the software flow pattern of this Elevator Door Control System, this diagram of circuit mainly is comprised of main program and timer interrupt program, because the torque hysteresis comparator is larger to resource consumption, therefore choose the dsp chip TMS32LF28234 of 150Mhz, by the up-to-date release of Texas Instrument, be specifically applied to electric machine control, guaranteed the reliable and stable of the utility model door machine controller.

The main program part mainly completes following steps: DSP initialization 600, system parameter initialization 601, detect current HALL signal, determine BLDC initial sector 602, serial data interactive module 604, digital menu module 604, input/output module 605, extend out FLASH module for reading and writing 606,1ms interval PWMDAC analog signal output module 607.

The 100us interrupt routine of DSP timer TIMER0 mainly completes following steps: biphase current sampling 700, other fault inspection 701 such as overvoltage/undervoltage, overcurrent, HALL dropout, HALL signal capture and velocity location calculate 702, according to counter potential trapezoidal wave function, calculating three-phase approximate reverse electromotive force 703, speed ring PI regulates 704, electromagnetic torque estimation 705, the stagnant ring of electromagnetic torque regulates 706, according to switch change and rotor-position etc., selection space vector of voltage 707, send pwm signal 708, gate-width study 709, elevator door-motor Logic control module 710.

Claims (2)

1. an Elevator Door Control System, it comprises the DSP minimum system, the bridge rectifier circuit be electrically connected to successively, filtering and current foldback circuit, three phase full bridge inverter circuit and motor, the EPWM output interface of DSP minimum system is isolated negative circuit by pwm signal and is electrically connected to the three phase full bridge inverter circuit, filtering and current foldback circuit are electrically connected to the external interrupt interface of DSP minimum system by the over-and under-voltage protective circuit, it is characterized in that: described motor is brshless DC motor, described Elevator Door Control System also comprises the current sample modulate circuit of the biphase current for the brshless DC motor of sampling be electrically connected to the DSP minimum system, the hall signal sampling modulate circuit of the hall signal for the brshless DC motor of sampling be electrically connected to the DSP minimum system.

2. Elevator Door Control System according to claim 1, it is characterized in that: the serial parallel communication interface of described DSP minimum system is electrically connected with liquid crystal drive and driven in series circuit.

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