RX50 H-Bridge Motor Driver

REACTOR RX50 H-Bridge Motor Driver

FEATURES:

  • With optional heatsink installed:
    30 Amps continuous, 40 Amps peak

    With NO heat-sink installed:
    10 Amps continuous

    Active cooling with forced air such as with a 60mm fan can provide even more current carrying headroom.

  • 5 to 24 Volts (30V absolute max)
  • high frequency PWM, frequencies to 100 kHz
  • ATO style fuse on-board
  • status and power indicator LEDs
  • convenient FAST-ON blade type connectors
  • convenient screw terminals for control logic
  • mounting holes matched for 60 mm fan
  • power header for fan (uses motor supply voltage)
  • locked anti-phase native control method
  • sign magnitude / synchronous rectification also possible
  • small size - 2.5 x 2.6 inches
  • high quality 4-layer board, large ground and power planes

NOTE: Not RoHS compliant

What is an h-bridge?

An h-bridge is used to convert low-power control signals into high-power drive for motor control as well as other high power applications. For example, to control a motor in the forward and reverse directions as well as the motor's speed, you need an h-bridge. One h-bridge is required per motor. The microcontroller connects to the h-bridge's logic level inputs, and the h-bridge converts those low power control signals into high power outputs suitable for driving the motor, controlling the motor's direction, and varying the motor's speed.

The REACTOR RX50 is a high performance h-bridge designed to drive brushed DC motors and other inductive as well as resistive loads. Includes a 20 Amp fuse and heat sink as shown. The RX50 is controlled by direct PWM using locked anti-phase signaling. Sign-magnitude signal control is available using the optional RX50SM module. Note that even when using the RX50SM module, the motor never free-wheels and thus provides tighter control than typical sign-magnitude control implementations. Free-wheeling is inherently not an issue when using the native locked anti-phase control.

RX50SM Sign-Magnitude Logic Module

The RX50 incorporates the ability to provide additional forced air cooling through the use of an optional cooling fan kit. This allows the h-bridge to handle even higher power loads by actively cooling the heat sink.

DARPA Grand Challenge Proven

The RX50 h-bridge is race proven in the brutal DARPA Grand Challenge, where it stood up to the harsh, hot, dusty desert conditions and performed flawlessly for Team Insight Racing.

Download RX50 manual.

RX50
Price: $89

Qty:
REACTOR RX50 H-Bridge, w/o Heatsink
REACTOR RX50 H-Bridge, assembled and tested with 20 Amp fuse, heatsink not included. Use this configuration if you need about 10 Amps of current carrying capacity, or if you want to supply your own heat sink.
RX50-HS
Price: $120

Qty:
REACTOR RX50 H-Bridge, Heatsink Installed
REACTOR RX50 H-Bridge, assembled and tested with 20 Amp fuse, heatsink installed. Use this configuration for about 30 Amp currently carrying capacity (at 12V). We use a high quality custom drilled and tapped aluminum heat sink, electrically isolated from the MOSFETs using 4 Bergquist high performance, high reliability Sil-Pad thermally conductive insulating pads. The heatsink is mounted securely to the MOSFETs, each individually, using 4 #4 screws and insulating bushings.
RX50-HSK
Price: $15

Qty:
REACTOR RX50 H-Bridge Heatsink Kit Only
REACTOR RX50 H-Bridge Heat Sink Kit - install this heat sink to cool the RX50 MOSFETs for increased current carrying capacity. Includes a high quality custom fit, drilled and tapped heat sink, 4 Bergquist high performance, high reliability Sil-Pad thermally conductive insulating pads for electrical isoltion from the heatsink. Also includes 4 mounting screws, and 4 insulating bushings, as shown.
RX50-EIK
Price: $7

Qty:
REACTOR RX50 H-Bridge Heatsink Electrical Isolation Kit
REACTOR RX50 H-Bridge Heat Sink Electrical Isolation Kit - Use this kit if you are using your own heat sink but still require electrical isolation between the RX50 MOSFET tabs and your metal heat sink. This kit includes 4 Bergquist high performance, high reliability Sil-Pad thermally conductive insulating pads, 4 #4 screws and 4 insulating bushings, as shown.
RX50SM
Price: $10

Qty:
REACTOR RX50 Sign-Magnitude Logic Module
REACTOR RX50 sign-magnitude logic converter module, converts sign-magnitude input drive logic to the native locked anti-phase logic used on the RX50 H-Bridge. Enables the use of sign-magnitude drive with the RX50.