An J1939 H-bridge circuit is a circuit for reversing DC loads in electric equipment like motors in DC cylinders or linear actuators. The simplest form of DC motor is a two-wire configuration, which is the most cost-effective type for OEMs. An H-bridge circuit provides motor control in the form of a simple circuit with four switches, either transistors or metal-oxide-semiconductor field-effect transistors (MOSFETs). The switches in the H-bridge are arranged strategically to control the current flow direction through the load.
SMP Trombetta’s J1939 H-bridge module is ideal for operating in harsh conditions. We have over a century of experience delivering motor control and thermal management solutions for vehicles in various sectors. Here we will explore the features of the J1939 H-bridge module and the applications and benefits of using an H-bridge module for DC motor control.
J1939 H-Bridge Circuit Features
The J1939 H-bridge Circuit offers several features that make it an ideal control circuit for DC motors. The DC Motor H-Bridge Circuit enables control of output direction, frequency, duty cycle, and peak current via CAN. Operating voltages of 12V to 24V are available with a max output current of 20A. It comes with built-in short circuit and overload protection along with reverse battery and voltage transient protection. Other specifications are:
- PWM range between 5Hz and 5000Hz
- Operating temperatures between -40 °C and 105 °C
- Duty cycle increments of 0.1%
- IP67-rated for waterproofing
- Auto baud rate detection between 125Kbps and 1Mbps
- LED output polarity status
- “Poka-yoke” or fail-proof mounting
H-Bridge Circuit Main Applications
The J1939 H-Bridge Circuit offers internal control in various applications. The most common applications that rely on an H-bridge module include:
- DC Motor Control: A preferred method for controlling the direction and speed of DC motors. H-bridges are used in everything from electric vehicles and industrial machinery to household appliances and toys.
- Stepper Motor Control: Precision machinery like CNC machines and 3D printers rely on stepper motors. An H-bridge delivers precise motor direction and speed control in these motors.
- Inverters: Used in inverters, H-bridges can convert DC to AC power. Many applications use inverters for this purpose, including electric vehicles, solar power systems, and uninterruptible power supplies (UPS).
H-Bridge Circuit Benefits
J1939 H-bridge circuits deliver several advantages. The benefits of an H-bridge circuit include:
- Direction Control: They provide bidirectional control, allowing the DC motor to move forward and backward for applications such as robotics.
- Speed Control: They can control the motor speed depending on the input voltage.
- Efficiency: The use of MOSFETs in H-bridges provides high efficiency and reliability. The solid-state design also means there are no parts to wear out, minimizing maintenance needs.
- Precision: H-bridges permit precise movement for high-precision applications, such as CNC machining and 3D printing.
Circuits From SMP Trombetta
An DC Motor H-Bridge Circuit is vital to controlling DC electric motors, offering efficient and precise speed and direction control. The J1939 H-Bridge Circuit from SMP Trombetta is ideal for DC motor control, withstanding low and high operating temperatures and offering IP67 waterproofing. It is easy to mount and can be used for DC motor control, stepper motors, and inverters.
SMP Trombetta modules are made for operation in harsh environments. Our modules have an integrated automotive connector interface to provide superior ingress protection and meet the needs of the mobile equipment market. We specialize in solutions for thermal management and vehicle control in on-highway and off-highway vehicles. We maintain IATF 16949, ISO 14001, and ISO 9001 certifications to deliver sustainable and high-quality products. Contact us to discuss your H-bridge circuit needs.