Representative imagePWM Battery Chargers
A PWM battery charger is an IGBT-based, pulse-width-modulated AC-to-DC charger that delivers controlled, regulated current and voltage to charge industrial battery banks while keeping input current harmonics very low.
Overview
A PWM battery charger is an IGBT-based, pulse-width-modulated AC-to-DC charger that delivers controlled, regulated current and voltage to charge industrial battery banks while keeping input current harmonics very low. These 'Battery Chargers using IGBT PWM rectifier dynamically charge the battery and enhance battery life,' with current harmonics THDi < 10%. The IGBT PWM front end gives high input power factor and low THD (downsizing the upstream AC supply), while closed-loop control provides proper multi-stage charging — bulk/boost (high current), absorption (constant voltage) and float (maintenance) — so the battery is charged quickly and then held without overcharge, extending battery life. Buyers choose ACE's PWM chargers for power plants, substations, UPS/DC systems and other critical standby applications where clean charging and battery longevity matter.
Specifications
| Topology | IGBT PWM rectifier (active front-end) charger |
|---|---|
| Input current harmonics | THDi < 10%; modern IGBT designs achieve < 5% |
| Input power factor | high (~0.99) |
| Input | 1-phase or 3-phase, 415 V class, 50/60 Hz |
| DC output voltage | common battery banks e.g. 24, 48, 110, 220 V DC (application-specific) |
| Output current | sized to battery Ah / recharge time |
| Charging modes | float and boost (FCBC); constant-current / constant-voltage multi-stage profile |
| Control | microprocessor/digital with current limiting (e.g. ~10-90% of rated) |
| Regulation & protection | voltage/current regulation, over-voltage, over-current, battery-fault alarms |
| Cooling | natural / forced air per rating; standards IS / IEC 60146, IEC 61000, IEEE-519 |
Applications
- Power-plant and substation DC systems
- Switchgear control / tripping battery supplies
- UPS and telecom DC power
- Industrial standby and emergency battery banks
- Solar / off-grid battery charging
Frequently asked questions
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