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LE-50PAU
CHAPTER-1 POWER AMPLIFIER / MANUAL POWER SOURCE
This chapter described the handling procedue of LE-5-PAU power amplifier for cases with it is used as a
power amplifier itsself by using each tension control unit in combination and when it is used as a manual
power source, using the valuable resistor.
For case when the power amplifier is used as a winding diameter detection type semi-automatic tension
contorl unit by using the LE-5AP operator panel in combination, refer to the description given in dhapter-2.
The power amplifier is used to control the excitation current of powder clutch / brake and hysteresis clutch
/ brake, depending on the input signal voltage.
The contorl system used comes in "Voltage control system" by output voltage feedback and "Current contorl
system" by outpuf current feedback.
The power amplifier of this type is applicable to both systems, however, it is generally recommended to use
it by the current control system.
The power amplifier is incorporated with such function as to compensate the non-linearity of transmission
torque characteristic against excitation current for clutch / brake, and is suitable to the execution of correct
tension control.
2
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