Description
Mitsubishi Drive Board KCR-759 introduction
| Mitsubishi Drive Board | |
| Brand | Original |
| Model | KCR-759
KCR-759B KCR-759C
|
| Goods No. | GPS-3 |
| MOQ | 1 |
| Warranty Time | 1 year |
| Certificates | ISO9001 |
| Brand | Mitsubishi |
Mitsubishi Drive Board KCR-759 – Vector Power and Safety for Mitsubishi Elevator Drives | Nanjing Zhuye Elevator Parts
Behind every smooth Mitsubishi lift ride is a brain that never blinks. The KCR-759 drive board is that brain — a 30 kW vector-control module that converts DC-bus energy into silky three-phase power while regenerating braking energy back to the grid. Rated for 4 m/s and SIL-2 safety, it feeds encoder feedback, motor current and temperature data to the KONE LCE or Mitsubishi MAXIEZ CPU in real time. When it stalls, the car jerks, levelling drifts, and the drive faults. Nanjing Zhuye Elevator Parts keeps genuine KCR-759 boards in anti-static packaging, pre-flashed with the latest firmware and ready for same-day despatch — helping you restore premium performance without costly OEM delays.
Product snapshot
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Mitsubishi part number KCR-759, hardware rev. 759, firmware KCR-30.9
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30 kW continuous, 55 kW 60 s overload, 400 VDC bus, 0-480 V three-phase output
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Dual DSP + ARM Cortex-M7, cross-checked for SIL-2 safety integrity
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Integrated current sensors (±0.5 %), DC-bus voltage sensing and IGBT temperature diodes
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Regenerative braking IGBT, 1 200 V, 100 A trench-gate, efficiency > 98 %
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On-board brake chopper, 20 kW continuous, 20 % duty, no external resistor up to 1 600 kg
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3 CAN-FD, 1 RS-485, 1 Ethernet 100/1000 for real-time torque, speed and health telemetry
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Operating temperature −10 °C to +70 °C, conformal-coated both sides, UL 94-V0
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IP20 aluminium heatsink, 300 × 165 × 78 mm, 2.4 kg, plug-in header, hot-swap compatible
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CE, UL, RoHS, REACH and Mitsubishi QES 2024 approved
Where it works
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Mitsubishi MAXIEZ, NEXIEZ, KONE LCE modernisation up to 4 m/s, 1 600 kg
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Modernisation packages replacing obsolete KCR-758 or six-step drives
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Any controller demanding < 1 % speed ripple and ±1 mm levelling accuracy
Installation method – 15-minute field swap
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Place lift on inspection mode; stop at mid-shaft; switch OFF main breaker; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V indicated on LED).
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Photograph existing wiring; note encoder plug orientation.
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Release two side latches; slide old KCR-759 out of DIN rail.
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Insert new board until latches click — no tools required.
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Re-connect motor phases U/V/W, brake resistor, encoder, CAN-FD, 24 V logic.
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Power up; green “DC” LED must illuminate within 3 s, “MCU” LED blinks blue.
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Launch Mitsubishi Drive Tool (MDT-30) on laptop; auto-tune detects motor parameters in 120 s.
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Run 20 full-speed cycles; verify temperature < 65 °C on heat-sink and no over-current alarms.
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Seal cabinet; log serial number and firmware v30.9 in maintenance book.
Replacement cycle & preventive maintenance
Mitsubishi bulletin SB-KCR-2024-07 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for swollen DC-link capacitors.
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Measure IGBT Vce sat < 1.8 V at rated current; replace if > 2.5 V.
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Capacitor reform every 8 years or 30 000 operating hours; if ESR > 150 % of nominal, replace entire board.
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Replace cooling fan (24 V, 120 mm ball-bearing) every 4 years — bearing lock is the #1 cause of overtemperature faults.
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Immediate replacement if:
– HMI shows “Over-current 03” at start-up (IGBT short),
– DC-bus ripple > 5 V under load,
– heat-sink temperature > 75 °C with clean filter,
– CAN-FD communication lost (blue LED dark).
Pro tip: 60 % of premature failures are traced to loose motor terminals — re-torque to 5 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use shielded encoder cable, foil facing inward, grounded at board only, to prevent Hall-sensor noise.
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Never run motor cables in the same trunking as 400 V mains — induced spikes kill gate drivers.
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Keep a spare KCR-759 in every high-rise service room; at 2.4 kg it fits on a shelf and saves a night call.
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After lightning storm, check DC-bus voltage ripple < 3 V; mains sag forces higher current and overheats IGBTs.
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Order the “KCR-759 Bundle” (board + fan + thermal paste) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are a Mitsubishi-authorised distributor, importing KCR-759 directly from the Nagoya factory, pre-loading firmware KCR-30.9 and testing every unit on a 30 kW motor rig for 60 min under full load. Boards are shipped in anti-static foam with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse holds 200+ units year-round; orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at three pieces; we can pre-set motor parameters and include a loaner board to keep your lifts running during the swap.
Conclusion
The KCR-759 drive board is the silent powerhouse behind every smooth Mitsubishi ride. By installing the genuine unit, following the torque schedule and replacing it before capacitors age, you eliminate jerky motion, over-current faults and costly entrapments. Stock genuine KCR-759 from Nanjing Zhuye Elevator Parts today — because when the drive stops, the whole building stops.
