Description
WOODWARD 8272-582 APM Motor Control
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 8272-582 |
| Manufacturer | Woodward |
| Product Type | APM Motor Control |
| Document Number | 82044 |
| Input Type | AC or DC |
| Input Voltage | 100–220 VAC/DC |
| Motor Type | 24 VDC permanent-magnet motor |
| Output Type | Variable DC |
| Output Voltage | 0–24 VDC adjustable |
| Recommended Output Range | 10–24 VDC |
| Main Function | Governor speed-setting motor control |
| Speed Adjustment | Potentiometer |
| Motor Direction | Determined by motor/governor wiring and switch arrangement |
| Cooling | Metal mounting plate provides cooling according to the original installation documentation |
| Related Model | 8272-583 |
The original specification states that the 8272-582 converts a broad range of input power to variable DC voltage for a 24 VDC PM motor. It also specifies a potentiometer for adjusting the rate of speed-reference change. The document recommends a 10–24 VDC operating output for the PM motor.
Product Introduction
The WOODWARD 8272-582 is an Advanced Permanent Magnet (APM) Motor Control used with Woodward 24 VDC permanent-magnet motors in governor speed-setting applications. Rather than acting as the primary electronic engine governor, it supplies the variable DC motor drive required to position a mechanical speed-setting mechanism. Woodward’s 82044 documentation specifically identifies the 8272-582 as an APM Motor Control for this application.
The important engineering distinction is between the governor controller and the motor-control stage. The 8272-582 belongs to the latter. It accepts 100–220 VAC/DC and produces an adjustable DC output for the PM motor. This makes the unit particularly relevant when maintaining older governor installations where the speed-setting motor and its control circuit must remain compatible with the original governor arrangement.
WOODWARD 8272-582
Engineering Pain Point
A common replacement error is treating the 8272-582 as a generic DC motor controller. Its output is intended for a specific Woodward PM motor and governor speed-setting arrangement. The original documentation also shows that a double-pole, double-throw switch is incorporated in the motor-output circuit and that motor lead orientation determines the raise/lower direction. Replacing the module without checking that wiring can produce reversed speed-reference action.
Typical Applications
- Woodward governor speed-setting motor circuits
- Diesel and engine-driven generator governor systems
- Marine engine governor installations
- Prime-mover speed adjustment mechanisms using Woodward 24 VDC PM motors
- Legacy Woodward governor systems requiring AC/DC input conversion for the speed-setting motor
Technical Pitfalls to Avoid
- Do not confuse 8272-582 with 8272-583. The 8272-582 accepts 100–220 VAC/DC, while the documented 8272-583 is the 24 VDC-input version.
- Verify the PM motor before connection. The APM controller was designed around Woodward 24 VDC permanent-magnet motors; it should not be treated as a general-purpose DC drive.
- Check the raise/lower wiring. The original installation documentation specifies a DPDT switch arrangement and gives motor-lead configurations for governor direction.
- Do not assume 24 VDC is the input. For 8272-582, 24 VDC is the motor-side nominal voltage; the controller input is 100–220 VAC/DC.
- Respect the output adjustment range. Woodward specifies 0–24 VDC adjustable output and recommends 10–24 VDC for the PM motor.
- Check the original governor application. Field records associate 8272-582 with Woodward 3161 governor systems and governor speed-setting motors, but the actual installed governor model should be confirmed from the equipment documentation rather than inferred from the spare part number.
Related Products
- Woodward 8272-583 — APM Motor Control variant for 24 VDC input; electrically different from the 100–220 VAC/DC-input 8272-582.
- Woodward 5484-909 — 24 VDC PM motor appearing in documented Woodward 3161 governor spare-part configurations; verify the actual motor installed before substitution.
- Woodward 3161 Governor — Governor system associated with the 8272-582 APM motor-control application in field documentation.
- Woodward 03107 — Speed-adjusting motor identified in 3161 governor spare-part records; its electrical and mechanical arrangement must be checked before pairing with an APM controller.
- Woodward 2301A — Electronic speed/load control family listed separately in Woodward’s documentation index; it should not be confused with the APM motor-control function of 8272-582.
- Woodward 8272-682 / 8272-685 — Digital Reference Unit family listed separately from the APM Motor Control documentation; these are not direct substitutes for 8272-582.
Procurement Note
For replacement work, specify WOODWARD 8272-582 together with the installed governor model, PM motor part number, input supply, wiring arrangement, and nameplate information. The most important electrical check is that the installation provides the correct 100–220 VAC/DC controller input while the connected motor is the appropriate 24 VDC PM motor.
Do not substitute the 8272-583 simply because it has the same APM function. Its documented input is 24 VDC rather than the 100–220 VAC/DC input of the 8272-582.
Because this is legacy Woodward hardware, verify the actual terminal markings and wiring against the installed unit and the original governor drawing before energizing. The available 82044 documentation is the appropriate technical reference for the 8272-582/8272-583 APM Motor Control family.
