What Is a Trigger Transformer?

Thyristor trigger is a high-power solid-state relay composed of single-phase, dual-phase, three-phase, resistive load thyristor power regulation circuit and high-current thyristor. One of the most important functions of thyristors is voltage stabilization and current stabilization.

Thyristor trigger transformer

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Thyristor trigger is a high-power solid-state relay composed of single-phase, dual-phase, three-phase, resistive load thyristor power regulation circuit and high-current thyristor. One of the most important functions of thyristors is voltage stabilization and current stabilization.

1. Epoxy potting, fully enclosed, circuit board soldering installation. 2. High electrical strength between windings. 3. Multiple changes are applicable to trigger and drive requirements. 4. The electrical parameters are the same as similar foreign products and can be directly replaced.

Instructions: 1. r1 and d1 mainly play the role of freewheeling. d1 is generally 1n4007, r1 is 1k 2k; 2 d2, d3, r2 are mainly used for shaping. d2, d3 can be 1n4007, and r2 can be tens to hundreds of ohms.

Thyristor transformers and thyristors are used together. They are usually connected between the control trigger unit and the thyristor control pole in the thyristor device. On the one hand, it transmits trigger pulses and on the other hand, it is reliable for strong and weak current Isolation. The kcb series trigger transformer can be widely used in: Voltage regulating and speed regulating equipment Rectification equipment Welder Inverter inverter equipment Elevator Automatic control device Medium frequency power supply Other thyristor devices

: 50hz-1000hz w Frequency characteristics: Low-frequency core shape: e-type moisture-proof method: canned cooling method: natural cooling type: dry structure type: single-phase transformer shape size: 26.5 * 22.5 * 25.5 mm

472, 419 (419s), 418 (418s) and kmb-00, kmb-01, kmb-02, kmb12 series thyristor trigger transformers are specially used for electric power drag, electrochemistry, electric heating, soft start of motors, etc. Thyristor triggering in power and voltage regulation circuits. The kmb-00, kmb-01, kmb-02 series use high-quality ei-line silicon steel sheets, and KBM112 is made of permalloy, which is suitable for single or double pulses with wider pulses ( For example, the kj04, kj09, and tc785 chips are used as phase-shift triggers. For pulse trains or modulation pulses that are widely used at present (such as tc787, as phase-shift triggering methods), generally 472, 419 wound with high-quality ferrite cores are used. (419s), 418 (418s) series, of which 472 applies to thyristors below 300a, 419 (419s) applies to thyristors from 300-1000a, and 418 (418s) applies to thyristors from 500-2000a. 419s, 418s and 419, 418 electrical appliances have exactly the same performance, but the 419s and 418s are small and the pins are arranged reasonably. The user should also select the transformation ratio based on the operating voltage of the trigger circuit. Generally, the primary pulse voltage amplitude of the pulse transformer is 18v to 24v, and the pulse transformer with a transformation ratio of 3: 1 is selected. The voltage amplitude is 12v to 18v. The pulse transformer of 2: 1 has a voltage amplitude of 6v to 12v, and a pulse transformer with a transformation ratio of 1: 1 is selected. The amplitude of the pulse applied to the thyristor control electrode is 2-4v and the current is 50-300ma (refer to the thyristor trigger current given by the manufacturer); the thyristor with a pulse width of more than 20us can be reliably opened.