参数资料
| 型号： | DM300022 |
| 厂商： | Microchip Technology |
| 文件页数： | 20/56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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dsPICDEM? MC1L 3-Phase Low Voltage Power Module
1.2.9
Field Weakening
If the user is operating a brushless permanent magnet motor using field weakening by
employing phase advance, great care should be taken. If a FAULT trip occurs, firing
will stop, and the full back EMF magnitude, due to the motor's speed, will be present
on the output terminals. Should the peak of the back EMF be above the DC bus,
sudden uncontrolled motor braking will occur. The DC bus will rise in an uncontrolled
manner possibly causing damage to the power devices, DC bus capacitors and the
DC input supply. A speed greater than that which would produce a peak back EMF of
greater than 63V, with no field weakening, should not be used. This will protect the
power module, but the user should check the rating of their DC supply.
The same care should be taken with separately excited brushed DC motors if employ-
ing field weakening at high speed. If the field current were to be increased in error, a
similar braking phenomenon will occur if the back EMF rises above the DC bus. The
effect is likely to be less severe as a DC over-voltage will occur tripping out both the
armature and field supply (assuming the field is not supplied separately). For this
reason, if using a separately excited DC motor, it is recommended that both the field
and the armature are supplied from the unit.
1.3
1.4
DC POWER SUPPLY REQUIREMENTS
The user's DC power supply must be electrically isolated from the AC supply. The -DC
bus is connected to ground internally within the power module. This ensures that the
DC supply has a fixed potential with respect to ground rather than floating.
Typical DC power supplies are configured to only source current. If using such a
power supply when generating/braking, the brake chopper should be used to dissipate
the returned energy. The regulation voltage for the brake chopper will be slightly
above the DC power supply. This ensures that when braking occurs there is a
seamless transition between power being drawn from the supply and power being
dissipated by the brake chopper. The user should check that damage will not occur to
the DC power supply when this higher voltage is present on its output. If this is of
concern, then the user should fit a series diode of suitable current and voltage rating
between the DC supply and the DC input to the system. Clearly, if a battery supply is
used, energy can be returned to it by recharging. However, the user should ensure
that maximum recharge rates are not exceeded and that suitable ventilation is used.
CURRENT AND POWER LIMITATIONS
1.4.1
Introduction
The maximum power and current capability of the system is dictated by the allowable
temperature rise of the different components. Establishing maximum limits is not
simple given the host of different ways the user may use the system. The voltage and
the nature of the electrical load used both affects the dissipation that occurs. In
determining the allowable limits for the power semiconductors, the following
assumptions have been made:
? Heat sink is at 70°C (worst case over temperature trip point)
? Thermal resistance of the insulating thermal pad is 4°C/W
Note that the maximum output power of the system will always be the lower value due
to the DC input stage or the inverter output stage.
DS70097A-page 14
? 2003 Microchip Technology Inc.
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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