参数资料
| 型号： | DM300022 |
| 厂商： | Microchip Technology |
| 文件页数： | 23/56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
There is no reason why the user can not use two of the legs in an "H-bridge"
configuration for control of DC motors or other single-phase applications requiring
bi-directional current and voltage. Even a single leg could be used with just the low
side switch controlled for a simple unidirectional current application (e.g., field control
of a separately excited DC motor).
The detailed description of one "leg" (RED phase) is given below. The other legs are
identical in function.
1.5.3.2
POWER DEVICES
? Q3, Q4 – 75V N-Channel MOSFET transistors packaged in the industry standard
TO220. As the tabs of the devices are not isolated, a thermally conductive
insulator is used. Note that the internal parasitic body diodes of the MOSFETs are
used as the inverter freewheeling diodes.
? The tracking between the devices and to the DC bus is designed to minimize the
inductance that causes transient over/undershoots.
? R4 – A 3W 5 mW shunt resistor through which the low side switch and diode
returns to the -DC bus. The shunt is used for FAULT protection and (optionally) for
an alternative feedback signal - see Section 1.2.7 “FAULT Protection” and
1.5.3.3
GATE DRIVE
? U22 – An integrated high voltage IC (IR 2112) which provides gate control of a low
side and a high side power transistor. As the source of the high side device (Q3)
can be at any potential between -DC and +DC, and even beyond transiently,
internal circuitry must provide for the necessary level shifting to ensure correct
operation. The IR2112 does this without providing isolation. The 2112 also
monitors the low and high side power supplies and shuts down if an under voltage
is detected. The under-voltage lockout is automatically reset by a rising edge of a
firing command once a valid voltage is present. See www.irf.com for a full data
sheet.
The function of groups of the discrete gate drive components is explained below:
? R51, D28, C14, C17 – These components form a floating power supply for the
high side gate driving stage of U22. Whenever the low side MOSFET (Q4) or it's
anti-parallel diode is conducting, a charging path for C14 and C17 is formed. This
is because the 15V supply is referenced to the -DC bus and D28 conducts. When
the high side switch is on, and the low side switch is therefore off, D28 blocks
reverse current flow that would result from the bus voltage present on the inverter
output. This kind of floating supply is usually referred to as a "bootstrap". This
circuit is commonly used because it is both efficient and economical. It is
assumed that any bootstrap initial priming or any necessary refresh is carried out
? 2003 Microchip Technology Inc.
DS70097A-page 17
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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