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| 型号： | OMC507 |
| 英文描述： | 5 Amp. Push-Pull 3-Phase Brushless DC Motor Controller Driver(5A,推挽三相无刷直流电机控制驱动器) |
| 中文描述： | 5安培。推挽式三相无刷直流电动机控制器驱动程序（第5A，推挽三相无刷直流电机控制驱动器） |
| 文件页数： | 7/8页 |
| 文件大小： | 123K |
| 代理商： | OMC507 |
APPLICATION NOTE
Setup
The OMC507 is a current mode controller providing
control of motor current (torque) in proportion to a
current command; Figure 1 is representative of the
OMC507 configured as a current mode controller.
The OMC507 Motor Controller offers the user
versatility in both system performance and interface.
For example, the typical configuration of the OMC507
requires the user to provide an analog current
command signal (voltage) proportional to the motor
current— a 1 volt command is proportional to 1.2
amperes of motor current; the OMC507 can also be
configured such that the user provides a TTL PWM
input command or the analog current command signal
is set onboard. Consult the factory for details.
Also, the typical configuration of the OMC507 requires
the user to interface to the control and power sections
of the controller via wire solder terminations— the
control section will accommodate #22 AWG wire and
the power section will accommodate #18 AWG wire;
the OMC507 can also be configured to provide the
user with a connector solution for the control section.
Consult the factory for details.
Operation
The typical configuration of the OMC507 incorporates
a 0.020 ohm resistor to sense the motor current—
Vsense = Imotor x Rsense. The sense voltage—
current sense signal—is filtered and fed into the
current sense amplifier where the absolute value of
the signal is multiplied by two and biased up by
approximately 2.5 volts (Note: Adjust the offset adjust
potentiometer (RP1) onboard to accommodate the
current sense amplifier offset; the Command input
(location J1-5) must be grounded. Monitor the offset
adjust voltage at location J1-14).
Besides the implementation of the cycle-by-cycle
peak current limit/overcurrent limit protection feature
of the OMC507, the output of the current sense
amplifier is fed into the error amplifier which is
configured as a differential amplifier. An error signal
representing the difference between the current
command input and the value of the amplified current
sense signal is produced; the error signal is then
compared to a pulse width modulated (PWM) ramp.
And since torque is nearly proportional to the average
phase output current, the torque is controlled via duty
cycle control.
OMC507
2.1 - 7
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