KY-ZB cycle zero crossing trigger

一、概述(First, outline)

The KY-ZB cycle trigger is in the industry electric heating system most has the widespread application the SSR signal processing controller. Has the cyclical zero crossing type (PWM dutyfactor control) and the cycle zero crossing type (CYC variable period control) two control modes. The trigger uses the phase-locked loop synchronizing circuit, the automatic distinction phase. May do for the single-phase accent merit, three-phase three controls, three-phase two controls the zero crossing trigger control. Its superior cycle zero crossing control causes the load current the make-and-break is according to the sine wave with the distribution. It increased the adjustment precision and power source's use efficiency as well as avoids hitting the table needle phenomenon, the electricity saving effect is also very obvious. Mainly applies in ohmic load, the temperature heating control unit as well as each industry stove and so on.

二、性能特点(Second, performance characteristic)

○ does not have the foreword request limit, may use in the power source is 220V the supply frequency 50/60Hzelectrical network.

○ can with the domestic and foreign each kind of control instrument (temperature control unit), microcomputer's output signal direct connection.

○ is suitable for the resistive load, the control precision is high, the electricity saving effect is obvious.

○ has the superior cycle zero crossing output control, avoided hitting the table needle phenomenon.

○ limit output function (limit scope 0-100%).

○ two kind of output control pattern (PWM dutyfactor output, cycle CYC output control).on the

○ 20 seconds the electricity slow start uses in the average power which reduces the cold clean criticality to start.

○ integration structure: Collection power source, digit trigger control electric circuit in a body. The structure plays tightly, the debugging is easy, the wiring is simple.

○ uses the outer covering to be fixed and card trough installment, safe convenience dustproof reliable.

三、主要技术指标及使用(Third, the major technique target and uses)

the input signal: 4-20mA DC 0-5V DC 0-10V PWM input 10K potentiometer (when manual regulation)

output specification: Before the single-phase accent merit, three-phase three control, three-phase two controls (user to select, must tell Our company to carry on modulation).

directive function:

IN ?¤ ?input instruction ??

OUT ¤ ?cycle cycle output instructs

Power source use: AC1 and AC2 turn on 220VAC. Power loss 3W.

Load test: Tests when the trigger does not meet the load or the electric current is smaller than below 0.5A, SCR is unable the normal work. Therefore the load current please be bigger than 0.5A.

四、工作方法(Fourth, method of work 1.PWM and CYC choice)

1. Jumps the line selectivity control output type through internal PC.

2. output limit: Through internal adjustable potentiometer VR adjustment limit output (limit scope 0-100%).

3. load wiring way: Single-phase controls counter-parallel, three-phase three controls the triangle and the star connection all may not meet the median line, three-phase two controls the pure resistive load.

4.PWM input proportion cycle: The pulse-duration modulation (dutyfactor) the pulse, the fixed 2 seconds, the biggest input current permits 20mA.

5. three-phase load current examination: Because the SSR center zero spot is the fluctuation (zero crossing SSR cannot simultaneously breakover), sometimes inevitable will create with the controller power source synchronism end load current is bigger than other two, when application, may adjust the heater power symmetry or the exchange input phase adjusts balanced. If uses to the three-phase central earth or the PWM way, the load current is basically balanced.