参数资料
| 型号： | DM300022 |
| 厂商： | Microchip Technology |
| 文件页数： | 27/56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 |
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Set Up and Operation
? R84, R85, R88 and R89 – The resistors form the differential configuration of the
amplifier.
? LK5 and LK6 – These allow two different gain settings to be used by shorting out
R85 and R89. Note that both links must be used together for correct operation.
? LK4 – Provision is made for either bipolar or unipolar sensing by changing this
link. It changes the non-inverting input reference point between 2.5V and 0V.
Bipolar sensing is required for applications using sinusoidal modulation, whereas
unipolar sensing is sufficient for other applications.
Other points to note:
? No common mode filtering has been used, as the amplifier's inherent common
mode rejection is sufficient and it requires tight tolerance components to be
effective.
? Note that the output of the op amp is not glitch-free during switching transitions,
but tracks the current rapidly. It is assumed that suitable synchronization of the
sampling of the output is used to reject the glitches.
? The self-inductance of the shunts (approx. 10nH) causes an additional voltage to
be produced proportional to the rate of change of current. For typical motors, this
additional voltage is negligible, as the inductance is high enough to ensure a low
rate of change of current. If a low inductance load is used, the effect of the
additional voltage will have to be compensated for in the user's software.
1.5.6.3
DC BUS SHUNT RESISTOR FEEDBACK
In addition to the three inverter leg shunts, provision has been made to monitor the
current in the -DC bus. In many applications, the information contained in this signal
alone is sufficient to provide the required closed loop control. The operating range and
the quality of control will dictate whether a bus shunt alone can be used. Clearly, it is
the cheapest of all schemes to implement.
The current that the shunt has flowing in it at any given time depends on the state of
all three inverter legs. It should be recalled that having both switches in the same leg
on at the same time is not allowed. The top switch being off (Top Fire = 0) assumes a
bottom switch is on. It does not matter whether the current actually flows in the switch
or the anti-parallel diode. The result depends only on the magnitude and direction of
the output currents.
TABLE 1-5:
DC BUS SHUNT RESISTOR FEEDBACK
Fire R Top
0
0
0
0
1
1
1
1
Phase Y Top
0
0
1
1
0
0
1
1
Phase B Top
0
1
0
1
0
1
0
1
DC Bus Shunt
0
+IB
+IY
-IR
+IR
-IY
-IB
0
From Table 1-5 it is clear that bipolar sensing requires with the same scaling as that
used for the inverter leg shunts. It can be seen that for the 000 and 111 conditions
(which corresponds to zero output phase voltage), no information is available. This
can cause considerable problems if operation at low output voltages is required when
using sinusoidal modulation.
? 2003 Microchip Technology Inc.
DS70097A-page 21
相关PDF资料 |
PDF描述 |
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| DM320002 | BOARD EXPANSION PIC32 I/O |
| DM320003-2 | KIT EVAL PIC32 USB II STARTER |
| DM320003 | BOARD DEMO USB PIC32 OTG |
| DM320005 | BOARD EXPANSION FOR PIC32 KIT |
| DM320011 | BOARD AUDIO DEV FOR PIC32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM300023 | 功能描述:开发板和工具包 - PIC / DSPIC dsPICDEM SMPS Buck Demo Brd RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM300024 | 功能描述:开发板和工具包 - PIC / DSPIC dsPICDEM 1.1 GP RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM300027 | 功能描述:开发板和工具包 - PIC / DSPIC 16-bit Starter Demo Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM-3-000-K | 制造商:PacTec 功能描述:Case, Plastic; ABS; Black; 11.46 in.; 3.38 in.; 10.4 in.; UL 94-HB Rated 制造商:PacTec 功能描述:ENCLOSURE, DESKTOP, PLASTIC, BLACK; Enclosure Type:Desktop; Enclosure Material:Plastic; Body Color:Black; External Height - Imperial:3.38"; External Height - Metric:86mm; External Width - Imperial:10.4"; External Width - Metric:264mm;RoHS Compliant: Yes |
| DM-300-C | 制造商:Greenlee Textron Inc 功能描述:DMM 1000V RMS |
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