SOLENOID

VALVE

SOLENOID

CONTACTOR

PWM

CONTROL

BOARD

CLUTCH

BRAKE

MODULE

SOLENOID

ACTUATORSRELAYS

Robert M. Haney, BSEE, MSEE, PE

• Former Employers

– Delco Electronics

– IEC, Inc

– Sundstrand

– Barber Colman

– Caterpillar

• Clients– J.I. Case

– Delta Power Company

– MTE Hydraulics

– Dynacorp

– IDI Div Altra Motion

– Hamilton Sundstrand

Solenoid Control, Testing, & Servicing

Solenoid Products – Solenoid Actuators/Valves, Clutches/Brakes,

Contactors/Relays, Electronic Solenoid Controls, Solenoid Transducers

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & Servicing

MAGNETIC FLUX

F = Kf (NI)2

(Xg)2Where N = # of turns I = Coil Current

Xg = Gap Width Kf = Constant

FORCE

FERROUS FRAME

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & ServicingSummary of Chapter Contents

PART I: Testing of Solenoid Coils, Actuators, Valves,

Clutches/Brakes, Contactors/Relays

1. Testing of Solenoid Coils2. Testing of Solenoid Actuators

3. Testing of Solenoid Valves

4. Proportional Solenoid Actuators and Valves

5. Testing of Clutches and Brakes

6. Testing of Contactors and Relays

PART II: Electrical and Electronic Controls

7. DC/AC Voltage and Current Control

8. Coil Back EMF Suppression and Contact Arc Suppression

9. Peak-and-Hold Control

10. Proportional Control (Linear/PWM/Phase Control)

11. Adding Feedback – Position, Force, Pressure, Flow, etc

Solenoid Control, Testing, & ServicingChapter 1. Testing of Solenoid Coils

Some Electrical Theory Review

Solenoid Control, Testing, & Servicing

Chapter 1. Testing of Solenoid CoilsSome Electrical Theory Review

Solenoid Control, Testing, & Servicing

Resistance vs Temperature

6.0

8.0

10.0

12.0

14.0

-50 -25 0 25 50 75 100 125

Temperature (DegC)

Resistance (Ohms)

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & Servicing

Solenoid Control, Testing, & Servicing

DC PUSH SOLENOID AC PULL SOLENOID

Solenoid Control, Testing, & Servicing

Solenoid Actuators

Servicing Tips

PWM CURRENT DITHER

PWM CURRENT DITHER