Motor Control Electronics Handbook
This up-to-the-minute guide provides you with motor control fundamentals and progressive design tips, as well as the latest in electronics technology.
TABLE OF CONTENTS Motor Control Electronics Handbook
Chapter 4: Automotive Motor Controls
Richard J. Valentine
Motorola Semiconductor Products
Introduction
It is surprising to see how many motors can be found in cars and trucks. As shown in Table 4.1, over 50 motors may be used in a large, fully equipped vehicle. Even a small economy vehicle may use more than five motors. Several additional applications, such as electric steering, are currently under development, which will incorporate complex motor control designs.
| Motor usage | Quantity used | Average power, W | Variable speed | Direction F/R | Torque limit | Position feedback | Motor type | Design notes |
|---|---|---|---|---|---|---|---|---|
| Body and Chassis | ||||||||
| Wipers (s) | 2 5 | 100 | Yes | No | No | Yes | PM | Complex mechanical linkage |
| Washer pump (s) | 1 2 | 40 | No | No | No | No | PM |
|
| Wiper arm pressure | 1 2 | <25 | No | Yes | No | Yes | PM | Complex mechanical linkage |
| Door locks | 2 4 | 30 | No | Yes | No | No | PM | Locked-rotor operation |
| Window lifts | 2 5 | 50 | No | Yes | Yes | Yes | PM | Locked-rotor operation |
| Sunroof | 1 | 100 | No | Yes | Yes | Yes | PM | Locked-rotor operation |
| Trunk lock | 1 | 30 | No | Yes | No | No | PM | Locked-rotor operation |
| Antenna retractor | 1 | 25 | No | Yes | No | Yes | PM | Locked-rotor operation |
| Seat height adjustment | 2 | 50 | No | Yes | No | Yes | PM | Locked-rotor operation |
| Seat back adjustment | 2 | 50 | No | Yes | No | Yes | PM | Locked-rotor operation |
| Seat forward adjustment | 2 | 50 | No | Yes | No | Yes | PM | Locked-rotor operation |
| Lumbar air pump | 2 | 50 | No | No | No | No | PM |
|
| Pop-up headlamp | 2 | 50 | No | Yes | No | No | PM | Locked-rotor operation |
| Mirror adjustment, X, Y | 4 6 | <5 | No |
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