Views: 13 Author: Emma Publish Time: 2021-08-03 Origin: Site
Introduction of YUMO Solid State Relay
Product Features: Input current is small, the corrsponding speed , no noise, long life. Compatible with MCU, PLC and other interfaces.
Application: Used in computer peripheral interface equipment, electric furnace heating, thermostat equipment, CNC machinery, industrial automation equipment, signal lights, stage lighting control equipment instrumentation, Medical equipment, photocopiers, plastic machinery, air conditioners, washing machines, in addtion to chemical coal and other explosion-proof, moisture, anti-corrosion occasions have a large number of use, as a substitute for electromagnetic relay the ideal product for AC contactor.
SRS classification: According to the state, the solid state relay can be divided into single-phase solid state relays and three-phase solid relays. According to the output power, it can be divided as DC solid state relay and AC solid relay. According to the input power, it can be divided into AC solid state relay, DC control AC solid state relay, DC control DC solid state relay, solid state voltage regulator. AC solid state relays according to the way the switch is divided into voltage zero-crossing conduction type (referred to as zero-crossing type) and random conduction type(referred to as random type); by the output switching components are bidirectional thyristor output type SCR anti-parallel type (enhanced); according to the istallation points for the printed circuit with the needle inserted (natural cooling, without a radiator) and the device fixed on the metal floor (by cooling from cooling); the other the input has a wide range of input (DC3-32V) constant current and series resistor current limiting and so on.
The difference between zero-crossing and random SSR
When a valid control signal is applied at the input, the SSR output of the random type turns on immediately (at a subtle levelof speed), while the zero crossing type SSR has to wait for the voltage across the zero area (about +-15V) When it turned on. When the input terminal to withdraw control signal. Both zero-crossing and random SSRs turn off less than the hold current. Although zero-crossing SSR may result in a delay of half a cycle. But it reduces the impact on the load and the resulting radio frequency interference, becoming the ideal switching device, the most widely used in the "single-pole single-throw" switch occasions. With studio SSR special degree. Fast, it can control the phase-shift trigger pulse to easily change the AC grid voltage, which can be used in precise temperature control, dimming and other resistive loads and some inductive loads.
Bidirectional thyristor output of the ordinary type and one-way SCR anti-parallel output enhanced difference
In the case of inductive load, when the SSR is turned off by the on-state, a large voltage rise rate dv/dt (commutation dv/dt) will be generated due to the inconsistent phases of the current and the voltage. Thyristor ends, so the value exceeds the triac dv/dt index (typically 10V/MS) will cause the delay off, or even failure. The single-phase SCR for the unipolar work state, only by the static voltage rise rate dv/dt (typically IOOV/ms), enhanced by two unidirectional controllable anti-parallel SSR than by a triac general type SSR commutation dv/dt has been greatly improved, so the inductive or capacitive load occasions should choose enhanced SSR.