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●(現貨*)Pololu原廠 Dual VNH5019 For Arduino 雙路大功率直流電機 驅動擴展板 PI2507
NT$2,500
運費NT$50
條碼43426211
產品說明1

※本產品原廠代理從國外進口,有些交期較長,下訂前請詢問!

Pololu Dual VNH5019 Motor Driver Shield for Arduino (PI2507)

    Get your Arduino moving! This shield makes it easy to control two high-power DC motors with your Arduino or Arduino-compatible board. Its dual robust VNH5019 motor drivers operate from 5.5 to 24 V and can deliver a continuous 12 A (30 A peak) per motor, or a continuous 24 A (60 A peak) to a single motor connected to both channels. These great drivers also offer current-sense feedback and accept ultrasonic PWM frequencies for quieter operation. The Arduino pin mappings can all be customized if the defaults are not convenient, and the motor driver control lines are broken out along the left side of the shield for general-purpose use without an Arduino.

Overview

 

Features

    Pololu dual VNH5019 motor driver shield, assembled and connected to an Arduino Uno R3.     Pololu dual VNH5019 motor driver shield for Arduino, bottom view with board dimensions.

  • Wide operating voltage range: 5.5 – 24 V1
  • High output current: up to 12 A continuous (30 maximum) per motor
  • Motor outputs can be combined to deliver up to 24 A continuous (60 A maximum) to a single motor
  • Inputs compatible with both 5V and 3.3V systems (logic high threshold is 2.1 V)
  • PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
  • Current sense voltage output proportional to motor current (approx. 140 mV/A)
  • Motor indicator LEDs show what the outputs are doing even when no motor is connected
  • Can be used with an Arduino or Arduino clone (through shield headers) or other microcontroller boards (through 0.1″ header along the left side)
  • When used as a shield, the motor power supply can optionally be used to power the Arduino base as well
  • Arduino pin mappings can be customized if the default mappings are not convenient
  • Arduino library makes it easy to get started using this board as a motor driver shield
  • Detailed user’s guide
  • Reverse-voltage protection
  • Robust drivers:
    • Can survive input voltages up to 41 V
    • Undervoltage and overvoltage shutdown
    • High-side and low-side thermal shutdown
    • Short-to-ground and short-to-Vcc protection

This schematic is also available as a downloadable pdf: dual VNH5019 motor driver shield schematic (356k pdf)

VNH3SP30, VNH2SP30, and VNH5019 Comparison

    In addition to this VNH5019 shield, we offer carrier boards for two similar, older motor drivers from ST: the VNH3SP30 and the VNH2SP30. The VNH5019 is the only one of the three with a practical operating voltage above 16 V. The VNH5019 is the only driver of the three available on a Pololu Arduino shield.

    The current-related values in the table below (i.e. the entries to which footnote 3 applies) are the results of tests on only one or two of each driver version, so they do not capture potential unit-to-unit variation, and they were performed using the single driver versions, not the dual carriers. As such, the values should be treated as rough estimates of performance, not as performance guarantees. While these tests seem to indicate that the VNH2SP30 runs a bit cooler—and hence can deliver more continuous current—than the VNH5019, it is important to note that the three driver versions were tested at different times under potentially different conditions, so the results are not necessarily accurate indications of relative performance.

    In our tests, we noticed that the thermal protection on the VNH5019 was activating at a lower temperature (153°C) than on the VNH2SP30 (170°C), which could partially account for the shorter VNH5019 overheating times. However, we also observed that the VNH5019 was reaching slightly higher temperatures than the VNH2SP30 when used under the same conditions: the VNH5019 reached a temperature of 85°C after 3 minutes at 10 A while the VNH2SP30 reached a temperature of 80°C.

Real-world power dissipation consideration

    Each motor driver IC has a maximum continuous current rating of 30 A. However, the chips by themselves will overheat at lower currents (see the table above for typical values). The actual current you can deliver will depend on how well you can keep the motor drivers cool. The shield’s printed circuit board is designed to draw heat out of the motor driver chips, but performance can be improved by adding heat sinks. In our tests, we were able to deliver short durations (on the order of milliseconds) of 30 A and several seconds of 20 A without overheating. At 6 A, the chip gets just barely noticeably warm to the touch. For high-current installations, the motor and power supply wires should also be soldered directly instead of going through the supplied terminal blocks, which are rated for up to 16 A.

    This product can get hot enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.

    Many motor controllers or speed controllers can have peak current ratings that are substantially higher than the continuous current rating; this is not the case with these motor drivers, which have a 30 A continuous rating and over-current protection that can kick in as low as 30 A (50 A typical). Therefore, the stall current of your motor should not be more than 30 A. (Even if you expect to run at a much lower average current, the motor can still draw short bursts of high currents, such as when it is starting, if special steps are not taken.)

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本商品上架日期:2013-05-23.
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