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參數(shù)資料
| 型號： | MC1101A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Advanced Brushless Motor Control Chipset |
| 中文描述： | 先進(jìn)的無刷電機(jī)控制芯片組 |
| 文件頁數(shù)： | 32/70頁 |
| 文件大?。?/td> | 474K |
| 代理商： | MC1101A |
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32
Motor Output Control
The following diagramshows the control flow for the motor command
output by the chipset.
Trajectory
Generator
Actual
position
Motor command register
(SET_MTR_CMD)
To
Amp.
Servo filter
(PID or PIVff)
MTR_ON
MTR_OFF
PWMor
DAC signal
generator
Sinusoidal
Commutator
The chipset can be run in either closed loop mode, or open loop mode.
In closed loop mode the motor command is determned by the output of
the servo filter, which in turn is determned by the output of the
trajectory generator and the actual axis position. Closed loop mode is
the normal operating mode of the chipset.
Open loop mode allows the motor command to be directly set by the
host. Open loop mode is typically used when one or more axes require
torque control only, or to calibrate the amplifier.
Whether or not the motor command comes fromthe servo filter (closed
loop mode) or the motor command register (open loop mode), the motor
command is then commutated based on the encoder position and
commutation parameters specified by the host. See the section of this
manual on commutation for more details.
Here is a summary of the motor control commands.
Command
MTR_ON
Description
Enables closed loop servo control. In this
mode the source of motor command is the
servo filter and the motor command register
has not effect.
Disables closed loop servo operations. In
this mode the motor command is determned
by the motor command register, which is set
by the host.
Sets the motor command register, used to
control the motor output value during open
loop operations. For this command to take
effect the motor must be off (MTR_OFF
command).
Double buffered version of SET_MTR_CMD.
For this command to take effect the motor
must be off (MTR_OFF command), and an
UPDATE command must be given
MTR_OFF
SET_MTR_CMD
SET_BUF_MTR_CMD
GET_MTR_CMD
Retrieves the current motor command output
by the chipset. When in closed loop mode
this command will return the current output
value of the servo filter. When in open loop
mode this command will return the value set
using the SET_MTR_CMD command, or
SET_BUF_MTR_CMD after an UPDATE.
Retrieves the buffered motor value set using
the SET_BUF_MTR_CMD.
GET_BUF_MTR_CMD
Sinusoidal Commutation
In addition to trajectory generation and servo loop closure the
MC1231A chipset provides sinusoidal motor commutation of 3 and 2-
phase brushless motors.
The following diagramshows an overview of the control flow of the
sinusoidal commutation portion of the MC1231A chipset:
Target pos. &
vel. (fromprofile
generator)
Actual position
Phase A
command
Phase B
command
Phase C
command
Motor command register
(SET_MTR_CMD)
Actual position
(if encoder-based)
To
Amp.
Motor Output
(PWMor DAC16)
Actual position
(fromencoder)
Actual velocity
(for phase
advance)
Servo filter
(PID or PIVff)
MTR_ON
MTR_OFF
The commutation portion of the chipset uses as input the motor
command signal fromeither the servo filter, or the motor command
register (depending on whether the chipset is in closed loop or open
loop mode). This pre-commutated command signal is then multiplied by
commutation values derived froman internal lookup Sin/Cos table.
The commutation angle used in the Sin/Cos lookup is determned by
the position encoder as well as parameters set by the host processor
which relate the specific encoder used to the motor magnetic poles.
Two commutation waveforms are provided, one appropriate for 3-phase
devices with 120 deg. separation between phases (such as brushless
motors), and one appropriate for 2-phase devices with 90 deg.
separation between phases (such as stepper motors).
Other features of the MC1231A chipset are the ability to use Hall-
sensor inputs for phase initialization, to use an index pulse to maintain
commutation synchronization, to pre-scale the encoder input to support
a wider variety of feedback devices, and to provide velocity-based
phase advance for smoother and more efficient high speed operation.
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC1101A-P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advanced Brushless Motor Control Chipset |
| MC110M | 制造商:Thomas & Betts 功能描述:10A,INSERT,MALE,M10P |
| MC112061P | 制造商:LANSDALE 制造商全稱:LANSDALE Semiconductor Inc. 功能描述:Crystal Oscillator |
| MC1121 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100mA Charge Pump Voltage Converter with Shutdown |
| MC1121DMR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
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