CVR Series Contactless / Brushless Automatic Voltage Regulator - Solid State, No Spark Design

A contactless voltage stabilizer is an advanced type of automatic voltage regulator (AVR) that adjusts output voltage without using mechanical switches, relays, or moving parts (like carbon brushes in servo stabilizers). Instead, it uses solid-state semiconductor devices—such as thyristors (SCRs), IGBTs, or MOSFETs—to switch transformer taps or synthesize voltage electronically.

How It Works

1. Thyristor-Controlled Tap Switching (Static AVR)

• A multi-tap autotransformer provides several fixed voltage steps.
• Pairs of anti-parallel thyristors (SCRs) are connected to each tap.
• A microcontroller continuously monitors input voltage.
• When a correction is needed, it fires the appropriate thyristors to select the best tap—in under 10–20 milliseconds.
• No arcs, no wear, no noise.

2. PWM-Based Inverter Topology (Advanced Models)

• Converts AC to DC, then back to clean AC using IGBTs and PWM (Pulse Width Modulation).
• Can generate precise sine-wave output at exact voltage/frequency—similar to an online UPS.
• Offers superior waveform quality and wider correction range.

Key Advantages

Typical Applications

• Data centers & server rooms – where even brief voltage dips can crash systems
• Medical imaging equipment (MRI, CT scanners) – requires ultra-stable power
• Industrial automation & PLCs – sensitive to micro-interruptions
• Telecom towers – remote, unattended operation demands reliability
• Semiconductor manufacturing – nanosecond-level process stability
• Elevators & escalators – prevents erratic behavior during grid fluctuations

Q1: What Is The Guarantee?
A1:Within 5 Year From The Sale Date, If There Are Any Accessory Problems,You Just Provide The Photos Of Damaged Accessory, Then We Will Provide A Satidfication After-Sale Service For Free.

Q2: Can We Put/Show Our Own Logo On Your Products?
A2: Yes, No Problem, However, The Quantity Should Be A Bit Big.