参数资料
| 型号： | MC3PHACVPE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 19/36页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR CONTROLLER 28-DIP |
| 标准包装： | 13 |
| 应用： | AC 电机控制器，3 相 |
| 输出数： | 1 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 28-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 808 (CN2011-ZH PDF) |
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Operation
Standalone Application Example
values and jumpers have been selected to provide the following performance:
1. Base frequency of 60 Hz and positive PWM polarity (from Table 3 )
2. PWM frequency resistor 3.9 k ? , which implies 10.582 kHz from Table 4 ). (5v/(3.9k + 6.8k))*3.9k =
1.82 volts
3. Dead-time resistor = 5.1 k ? , which implies 4.5 μ s (from Figure 9 )
4. Fault retry time resistor = 8.2 k ? , which implies 32.8 seconds (from Figure 10 ).
5. Voltage boost resistor = 12 k ? , which implies 25.5 percent (from Figure 11 ).
6. The wiper of the acceleration potentiometer is set at 2.5 V = 64 Hz/second acceleration rate (from
the Acceleration Control description on page 11 .) The potentiometer, in this case, could have been
a resistor divider. If a resistor divider is used in place of the acceleration potentiometer, keep the
total resistance of the two resistors less than 10 k ? . Always use 4.7k ? in series with the center of
the acceleration voltage divider resistors, connected to the ACCEL (pin 27) as shown in the
7. Crystal/resonator capacitor values are typical values from the manufacturer. Refer to the
manufacturers data for actual values.
PC Master Software Operation
Introduction to PC Master Host Software
The MC3PHAC is compatible with Freescale ’s PC master host software serial interface protocol.
Communication occurs over an on-chip UART, on the MC3PHAC at 9600 baud to an external master
device, which may be a microcontroller that also has an integrated UART or a personal computer via a
COM port. With PC master software, an external controller can monitor and control all aspects of the
MC3PHAC operation.
When the MC3PHAC is placed in PC master software mode, all control of the system is provided through
the integrated UART, resident on the MC3PHAC. Inputs such as START, FWD, SPEED, ACCEL,
MUX_IN, and PWMPOL_BASEFREQ have no controlling influence over operation of the system. Even
though the SPEED, START, and FWD inputs are disabled while the system is in PC master software
mode, through PC master software, it is possible to monitor the state of those inputs.
The most popular master implementation is a PC, where a graphical user interface (GUI) has been
layered on top of the PC master software command protocol, complete with a graphical data display, and
an ActiveX interface. Figure 13 shows the MC3PHAC configured in PC master software mode. It is
beyond the scope of this document to describe the PC master software protocol or its implementation on
a personal computer. For further information on these topics, refer to other Freescale documents relating
to the PC master software protocol and availability of PC master host software.
MC3PHAC Monolithic Intelligent Motor Controller, Rev. 2
Freescale Semiconductor
19
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