Editorial Technical Reference

Power Supply/Inverter

This page explains how Power Supply/Inverter is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Electrical component that converts input power to controlled high-frequency AC output for induction heating

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Power Supply/Inverter in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Power Supply/Inverter

Definition
The Power Supply/Inverter is a critical subsystem within an Induction Heating Station. It takes standard AC mains power, converts it to DC, and then inverts it to high-frequency AC (typically 1-400 kHz) to drive the induction coil. This enables precise control of heating power, frequency, and timing for metal processing applications. The unit typically operates with an input voltage of 3×380 V AC ±10% (per IEC 60038), with other voltages available on request. Output power is selectable in the range of 15–60 kW, and output frequency is adjustable from 1–100 kHz for load matching. Efficiency is at least 90% at full load (per IEC 60034-2-1), and power factor is at least 0.95 at rated load (per IEC 61000-3-2). Output current capability ranges from 100–600 A peak. Cooling is by water with a flow rate of 10–20 L/min. Operating temperature range is -10 to 45°C (derate above 40°C) per IEC 60721-3-3, storage temperature is -20 to 60°C per IEC 60721-3-1, and humidity is up to 95% RH non-condensing per IEC 60721-3-3. Protection class is IP54–IP65 per IEC 60529, with higher ratings on request. Weight ranges from 80–150 kg depending on power rating, and typical dimensions for a 30 kW unit are 600×800×1200 mm (W×H×D). Materials used include silicon steel laminations, copper windings, aluminum heat sinks, ceramic capacitors, and epoxy resin insulation. This directory entry provides reference data; model-specific values and standards must be verified with the legal manufacturer or supplier.
Working Principle
The power supply/inverter operates by first rectifying incoming AC power to DC, then using solid-state switching devices (IGBTs or MOSFETs) to convert the DC back to high-frequency AC through pulse-width modulation (PWM) techniques. This high-frequency AC is delivered to the induction coil, creating an alternating electromagnetic field that induces eddy currents in conductive workpieces, generating heat through resistance. The frequency and power are adjustable to match the load and achieve precise heating profiles.
Common Materials
Silicon steel laminations, Copper windings, Aluminum heat sinks, Ceramic capacitors, Epoxy resin insulation
Technical Parameters
ParameterTypical rangeNotes & selection driver
Input Voltage3×380 ±10% V ACOther voltages on requestIEC 60038
Output Power15–60 kWSelectable power range
Output Frequency1–100 kHzAdjustable for load matching
Efficiency≥90 %At full loadIEC 60034-2-1
Power Factor≥0.95At rated loadIEC 61000-3-2
Output Current100–600 APeak current capability
Cooling MethodWaterFlow rate 10–20 L/min
Operating Temperature-10–45 °CDerate above 40°CIEC 60721-3-3
Storage Temperature-20–60 °CNon-condensingIEC 60721-3-1
Humidity≤95 % RHNon-condensingIEC 60721-3-3
Protection ClassIP54–IP65Higher on requestIEC 60529
Weight80–150 kgDepending on power rating
Dimensions (W×H×D)600×800×1200 mmTypical for 30 kW unit

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Rectifier Module
    Converts incoming AC power to DC
    Material: Silicon diodes, copper busbars
  • DC Link Capacitors Part
    Filters and stores DC power, stabilizes voltage
    Material: Aluminum electrolytic or film capacitors
  • Inverter Bridge
    Switches DC to high-frequency AC using IGBTs/MOSFETs
    Material: Silicon semiconductors, copper traces
  • Control Board
    Manages switching timing, protection, and user interface
    Material: FR4 PCB, electronic components
  • Output Transformer
    Matches impedance between inverter and induction coil
    Material: Ferrite core, copper windings

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (electrical component, no pressure rating)
other spec: Input voltage: 380-480V AC 3-phase ±10%, output frequency: 1-50 kHz adjustable, efficiency: >92% at full load
temperature: Ambient operating range: -10°C to +40°C, cooling required above 40°C
Media Compatibility
✓ Industrial water cooling systems ✓ Clean dry air environments ✓ Non-corrosive industrial atmospheres
Unsuitable: Wet, humid, or corrosive environments without proper IP-rated enclosures
Sizing Data Required
  • Required output power (kW)
  • Desired output frequency range (kHz)
  • Available input voltage and phase configuration

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Capacitor degradation
Cause: Electrolytic capacitor drying out due to high operating temperatures, voltage stress, or aging, leading to reduced capacitance and increased ESR, causing power instability or complete failure.
IGBT/MOSFET failure
Cause: Thermal cycling and overheating from poor heat dissipation, overcurrent conditions, or voltage spikes, resulting in short circuits or open circuits in switching components.
Maintenance Indicators
  • Audible high-pitched whining or buzzing from the inverter, indicating capacitor issues or transformer core saturation
  • Visible bulging or leaking capacitors on the PCB, or burnt/discolored components suggesting overheating
Engineering Tips
  • Implement regular thermal monitoring and ensure adequate cooling with clean air filters and proper ventilation to maintain operating temperatures within manufacturer specifications
  • Use voltage stabilizers or surge protectors on the input side and perform periodic capacitor testing/ESR measurements to detect early degradation before catastrophic failure

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 61000-6-2 (EMC immunity for industrial environments) UL 1741 (Inverter safety and grid interconnection) EN 50178 (Electronic equipment for power installations)

Quoted from the published standard.

Manufacturing Precision
  • Output voltage regulation: +/-2% of nominal
  • Frequency stability: +/-0.5 Hz
Quality Inspection
  • Hi-pot (dielectric withstand) test
  • Thermal cycling and load testing
Technical documentation
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Manufacturing capability
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Inspection readiness
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Supplier transparency
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Manufacturers of Power Supply/Inverter

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Frequently Asked Questions

What is the typical input voltage for this power supply/inverter?

The standard input voltage is 3×380 V AC ±10% per IEC 60038, but other voltages are available on request. Always verify the exact voltage requirement with the manufacturer for your specific model.

What output power and frequency ranges are available?

The output power is selectable from 15 to 60 kW, and the output frequency is adjustable from 1 to 100 kHz for load matching. These ranges are reference values; confirm the exact capabilities for your intended application with the supplier.

What cooling method is required?

The unit requires water cooling with a flow rate of 10–20 L/min. Ensure that the cooling system meets the manufacturer's specifications to prevent overheating and maintain performance.

What are the environmental limits for operation and storage?

The operating temperature range is -10 to 45°C, with derating above 40°C. Storage temperature is -20 to 60°C, and humidity is up to 95% RH non-condensing. These limits are per IEC 60721-3-3 and IEC 60721-3-1; always check the manufacturer's data for your specific unit.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Induction Heating Station
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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