Three-phase 400 Hz Medium-frequency Power Supply (High Power)

The 400 Hz intermediate frequency power supply produced by our company utilizes our proprietary patented technology and employs high-frequency power electronic switching conversion technology. It is a 400 Hz intermediate frequency static variable frequency power supply specifically designed and manufactured for aviation and military electronic and electrical equipment; it can be applied to aircraft and airborne systems, radar, navigation systems, other military electronic devices, as well as any other applications requiring a 400 Hz intermediate frequency power supply, serving as a next-generation replacement for fixed-type variable frequency power supplies. This product features a voltage and frequency adjustment range of ±20%, making it suitable for both balanced three-phase and arbitrary unbalanced loads, as well as for use as a single-phase power supply. It is compatible with various types of loads—including resistive, capacitive, and inductive loads—as well as various hybrid load configurations.

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Category: AC Power Supply Series

Product Features

Utilizes a dedicated SPWM chip, offering high control accuracy, excellent waveform quality, and compatibility with various loads;
IPM high-frequency static inverter: compact size, lightweight, low noise, high efficiency, and minimal external interference;
Microprocessor-controlled: output voltage and frequency are adjustable online, providing a clear overview of both operating and fault states;
Suitable for both three-phase balanced loads and any unbalanced loads; it can also be used as a single-phase power supply;
The digital LED panel features intuitive operation and ease of use, enabling you to work with greater confidence and proficiency;
It can be used standalone or mounted in a 19-inch standard cabinet.

Execution Standards: “GJB-2003 – Aircraft Power Supply Characteristics”, “GJB572-88 – Ground Power Supply Characteristics and General Requirements for Aircraft”, “Q/AK004-2001 – Technical Specifications for Static Frequency-Voltage Regulated Power Supplies”

Technical Parameters

capacity			450KVA	600KVA	800KVA	1000KVA
input voltage			220V/380V±10%
Input phase			Single-phase/Three-phase four-wire
Circuit Configuration			IGBT/SPWM Pulse Width Modulation (PWM) Technique
output frequency			400Hz and 300–500 Hz are continuously adjustable.
Load Regulation Rate			≤±1%
frequency stability			≤±0.01%
Waveform distortion degree			THD≤2%
output voltage		line voltage	0–260 V, continuously adjustable
		phase voltage	0–150 V, continuously adjustable
reaction time			≤2mS
show accuracy	4-frequency meters		Resolution: 0.1 Hz
	4-voltmeter		Resolution: 0.1 V
	4-Ammeter		Resolution: 0.01 A
	4 Power Meters		Resolution: 0.1W
communication interface			RS232 or RS485 is optional
protocol			MODBUS Communication Protocol
defencive function			Overvoltage, overcurrent, overheating, overload, short-circuit protection, and automatic alarm system
Insulating reactance			500Vdc 20MΩ
Dielectric insulation			1800 VAC / 5 mA / 1 minute
cooling-down method			Forced fan cooling
working temperature			-20℃-40℃
relative humidity			0–90% (non-condensing state)
above sea level			1,500 meters