参数资料
型号: DM300022
厂商: Microchip Technology
文件页数: 35/56页
文件大小: 0K
描述: MODULE PWR DSPICDEM MC1L LV 3PHS
标准包装: 1
主要目的: 电源管理,电机控制
嵌入式: 是,MCU,16 位
已用 IC / 零件: dsPIC33FJxxxMC
主要属性: 3 相低压电源模块
次要属性: 运动传感器输入:霍尔传感器或光学编码器
已供物品: 子板
Set Up and Operation
TABLE 1-9:
HALL EFFECT CURRENT TRANSDUCER SCALING SELECTION
LK1/LK15/LK18
Closed
LK2/LK14/LK17
Closed
LK3/LK13/LK16
Closed
Scaling (A / V)
Trip Level (A)
8
± 14.8
12
± 22.2
24
± 44.4
Note:
Important: For the system, as delivered, the highest current range (LK3,
LK13 and LK16) should not be used. This is because of thermal limitations
of the power devices. If the user requires less current, then using the lowest
current range (LK1) will give improved current feedback range and
resolution.
Once the modification is complete, install the lid ensuring all the screws are replaced.
1.6.3.1
CHANGING VOLTAGE FEEDBACK AND TRIP SCALING
The voltage feedback scaling is configured for the maximum range of input voltages. If
the user requires full ADC resolution at lower voltages, then this can easily be
accomplished by changing the high voltage resistors mounted on the top of the PCB.
? Follow the procedure given in Section 1.6.2 “Accessing The System” for
accessing the unit.
? To change DC bus voltage scaling, modify R10, R13, R14. Note, if using the back
EMF crossing detection circuitry (see Section 1.5.7.3 “Inverter Output Voltage
Feedback and Sensorless Detection” ), the user should also change the phase
voltage feedback resistors to ensure consistent scaling.
? To change phase voltage scaling modify R16 - R20.
? In all cases, it is suggested that the changes are made from the top of the board.
If new component legs are inserted, these should be cropped to ensure that the
maximum length of lead protruding below the PCB is 4 mm.
? Once the modification is complete, install the lid ensuring all the screws are
replaced.
1.6.3.2
MODIFYING OR REMOVING THE INTERNAL BRAKING RESISTOR
The type of braking resistor installed on the heat sink allows a maximum continuous
dissipation of 50W, but can tolerate many times this power level for short periods. The
value installed as standard only allows a maximum dissipation of 45W owing to its
high resistance. If the user wishes to change the resistor to a lower value or remove
the resistor completely as they are using an external resistor, then they should follow
the procedure given below.
? Follow the procedure given in Section 1.6.2 “Accessing The System” for
accessing the unit.
? De-solder or cut the wires to J7 and J8. This can be done from the top of the PCB.
? Undo the screws attaching the resistor to the heat sink and remove the resistor
and its wiring.
? If not fitting a new resistor proceed to the last step.
? Make up a wiring assembly for the new resistor with similar lead lengths and the
terminals protected with heat shrink sleeving. Ensure the wire has sufficient
current and voltage rating.
? Apply a thin, even coating of thermally conductive heat sink compound (e.g.,
Dow-Corning 340) to the back of the resistor.
? 2003 Microchip Technology Inc.
DS70097A-page 29
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