Programmable Frequency and Voltage Regulated Power Supply

Our company’s variable-frequency voltage-regulated static power supply is designed with a DSP processor at its core, incorporating SPWM control technology and DDS direct digital waveform synthesis technology. By integrating power electronics, automatic control theory, digital signal processing, and information technology, this product achieves intelligent, digitalized, visualized, and programmable operation of the variable-frequency voltage-regulated power supply, positioning it as a leading technological solution in China.

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Category: AC Power Supply Series

Product Features

1.Programmable Functions

General Functions – allows setting of a set of voltage, frequency, time, and operating output parameters;
Step-function feature – allows you to configure multiple sets (up to 30 sets) of step voltage, frequency, and duration; the system will then operate according to these configured steps; additionally, you can set the number of cycles and the cycle interval time;
Gradient Function – allows you to configure multiple sets (up to 30 sets) of start voltage frequency, stop voltage frequency, start time, and operating time; the system will then automatically perform an output operation by adjusting the VF according to these settings;
VF starting kinetic energy — For motor testing and high-power motor starting applications, a fixed-frequency variable voltage followed by variable frequency variable voltage mode can be configured to reduce the inrush current during startup;
Special Curve Simulation – For complex voltage and frequency variations, the voltage-frequency curve can be configured within the system based on customer requirements or relevant test specifications.

2.Supports parallel redundancy functionality

Supports dual-machine or multi-machine parallel expansion to increase system availability;
Supports dual-machine redundant operation, thereby enhancing power supply reliability;
The system supports independent operation with two or more units, as well as parallel expansion mode (for independent operation: each unit can set its frequency and voltage arbitrarily; for parallel operation).

3.Multi-purpose functionality

Operates in standard three-phase output mode, providing a standard three-phase voltage with phase differences of 120° between each output phase;
The device can also operate in single-phase mode; in this mode, the three single-phase output voltages, frequencies, and phases are identical. The three single-phase outputs can be connected in parallel externally to the power supply to function as a single-phase power source, thereby tripling the single-phase load capacity compared to traditional power supplies. The three-phase switching function requires only a single button press; no complex internal wiring adjustments are necessary. Additionally, the power supply features self-diagnostic and protection functions, effectively preventing output short circuits caused by erroneous switching between single-phase and three-phase modes;
Three-phase separate control function: The frequency and output voltage of each individual phase can be adjusted independently; each of the three single-phase outputs can deliver different frequencies and voltages.

4.Three-phase phase angle adjustable function

In the three-phase output mode, the phase angle of the three-phase output voltage can be adjusted over a range of 0–360° with an adjustment resolution of 1°;

5.RS232/RS485 communication interface

Utilizing the MODBUS communication protocol, users can achieve centralized control via a computer or PLC to set operating commands for the inverter power supply, modify or read functional parameters, and retrieve the inverter power supply’s operating status and fault information.

Technical Parameters

model	Ay330C*
output capacity	500VA-5000kVA
input voltage	Three-phase four-wire AC 380V ±10%
incoming frequency	50/60Hz±5%
operate mode	SPWM method, with sine wave output.
output frequency	25–25 kHz continuously adjustable
frequency stability	≤0.1%
output	Nominal current per phase: 13 A
output voltage	Phase voltage: 1.0–300.0 V; line voltage: 1.0–500.0 V (continuous adjustment with a step increment of 0.1 V).
Output phase number	three-phase
Source voltage effect	≤1%
Load effect	≤1%
Output voltage distortion factor	≤2% (resistive load)
Dynamic Characteristics	100% sudden load addition or removal; voltage surge ≤5%; recovery time: 20 ms.
Overload Alarm	>110% alarm
protector	Short-circuit protection, overload protection, overcurrent protection, and power device overheating protection.
Impact resistance	It can withstand startup surges from inductive loads with a power rating not exceeding 0.5 times the power supply’s rated power, or from rectifying loads with a peak factor not exceeding 3.0, and can operate normally under these conditions.
Operation Display	touch screen
Programming Functions	Programmable functions, parallel redundancy capability, multi-purpose functionality, three-phase phase angle adjustment capability, and communication functionality
CI	Optional RS232 or RS485 interface
protocol	MODBUS
Display voltage	Resolution: 0.1 V; Accuracy: ±(0.4% × measured value + 0.1% × full-scale value)
Display current	Resolution: 0.01 A / 0.1 A; Accuracy: ±(0.4% × displayed value + 0.1% × rated output value)
Display Power	Resolution: 1W; Accuracy: ±1% (for power factors ≥ 0.8)
outline dimension	530 × 1060 × 1250 (Width × Depth × Height, mm)
work environment	Temperature: 0–40 °C; Relative humidity: ≤90% RH