The BLH Series compact brushless DC (BLDC) motors and drivers have been a trusted choice for a long time, and for good reason. Customers appreciate the combination of a highly efficient, compact motor paired with a lightweight, board-mounted driver that’s easy to use. Additionally, the availability of a high-torque, flat-style hollow shaft gearhead as an option further enhances torque capabilities while minimizing the motor's footprint. So, how do we enhance something already popular? It's quite straightforward—we listen to our customers and transform their feedback into new features. Take a look at the newly redesigned BLH series brushless motor drivers below: - **Improved Performance Characteristics** - **New Digital Setting Type Driver and MEXE02 Support Software** - **Comparison: Analog Setting Type vs. Digital Setting Type** - **Compatibility Between Old and New Models** - **RS-485 Communication Type Driver** - **Changes in Part Numbering** - **Download the Brochure** --- **Enhanced Characteristics** Despite no changes to the motor design, pairing these new BLH Series drivers with existing BLH Series motors results in an impressive improvement in torque performance—both within the limited duty cycle and continuous duty cycle ranges. This boost in torque can significantly reduce tact times by accelerating or decelerating loads more quickly. For instance, take a look at the image showing the redesigned BLH brushless motor with enhanced torque capabilities. | **Type of BLH Series Driver** | **Acceleration/Deceleration Range** | |-------------------------------|-------------------------------------| | Older Drivers (Analog Only) | 0.5~10 seconds | | New Analog Setting Type Drivers | 0.1~12 seconds | | New Digital Setting Type Drivers | 0.1~15 seconds | Moreover, the new drivers introduce three distinct "deceleration stop" modes, offering more flexibility in halting the motor. These modes include: 1. **Deceleration Stop 1**: Generates a braking force during deceleration and stops the motor according to the preset deceleration time. Regenerative power is consumed by the motor and driver rather than returning to the power supply. 2. **Deceleration Stop 2**: Suppresses braking force to allow the motor to coast to a stop. If the preset deceleration time is shorter than the coasting time, this mode will not apply. 3. **Deceleration Stop 3**: Similar to Deceleration Stop 1 but returns regenerative power to the power supply. Ensure the battery can handle the returned energy. These improvements are particularly beneficial in applications involving automated guided vehicles (AGVs) and autonomous mobile robots (AMRs), where back electromotive force (EMF) can pose significant challenges. Deceleration Stop 1 minimizes issues related to back EMF, while Deceleration Stop 3 can even recharge the vehicle's battery. By expanding the acceleration/deceleration range and boosting torque, these motors achieve target speeds more quickly and stop more efficiently. A longer acceleration/deceleration time reduces required torque, enabling the motors to handle larger inertial loads if needed. --- **Reduced Noise Levels** Another notable enhancement in the updated BLH Series drivers is a reduction in overall operational noise. The new drivers utilize a sinusoidal drive method, reducing torque ripple and ensuring smooth rotation even at low speeds. As a result, the motor's operational noise is reduced by 13 dB. --- **Digital Setting Type Driver and MEXE02 Support Software** Previously, the BLH Series drivers were considered analog setting type, where speed settings were adjusted via an analog voltage signal provided by either an internal potentiometer, external potentiometer, or external DC voltage signal. The new digital setting type driver represents a fresh approach, offering advanced features and functionalities to enhance overall performance and ease of use. A key innovation lies in the addition of a **USB connector** on the driver board, enabling data setting through a **GUI-based MEXE02 support software**. Many of the new features stem directly from this software, which is used to program data into the driver. One major advantage of the digital setting type driver is the improved speed regulation, which has been tightened from ±0.5% to ±0.2%. This enhancement significantly improves synchronization among multiple motors, making it ideal for applications requiring precise coordination. With the MEXE02 software, users can now configure **8 speed data sets**, compared to just 2 speeds with the older analog setting drivers. The speed range has also been slightly expanded on the low end, from 80~3,000 RPM to 100~3,000 RPM, opening up opportunities for more low-speed applications. Other features enabled by the MEXE02 software include I/O signal assignments, torque limiting, teaching operation, and remote monitoring. Let’s explore these in detail: - **I/O Signal Assignments**: The software allows users to assign input functions based on their specific needs, avoiding wasted inputs for unnecessary functions. Although there are still six physical inputs and four outputs, users can choose from thirteen input functions and eight output functions. - **Torque Limiting**: This feature enables users to limit the motor’s torque to a percentage of its rated torque (100%). Applications such as pressure-sensitive stamping, pressing, capping, or screwing can benefit greatly from this capability. - **Teaching Operation**: Users can program speeds through the software's speed toggle function. Additionally, a data copy function ensures seamless synchronization of data between multiple drivers. - **Remote Monitoring**: Real-time monitoring of system status is possible through the MEXE02 software. Parameters such as speed, load factor, driver temperature, and alarm codes can be tracked. Predictive maintenance becomes easier with the ability to configure information bit outputs and connect them to the host PLC. --- **Analog vs. Digital Setting Types** Here’s a quick comparison of the differences between the new analog setting type driver and the digital setting type driver: | **Feature** | **Analog Setting Type Driver** | **Digital Setting Type Driver** | |---------------------------|-------------------------------|---------------------------------| | **Number of Functions** | Fewer | More | | **Speed Regulation** | ±0.5% | ±0.2% | | **I/O Connector** | 12-pin | 14-pin | The digital setting type driver introduces a larger I/O connector with one additional input and two additional outputs compared to the analog setting type driver. This provides greater flexibility in control and better status monitoring. Another standout feature is the ability to accept a PWM signal from the PLC to set speed, eliminating the need for an analog card on the PLC. --- **Compatibility with Existing Systems** One of the great advantages of the new drivers is their compatibility with existing systems. The older drivers, new analog setting type drivers, and new digital setting type drivers all maintain the same dimensions, making upgrades or replacements a breeze. Since all the enhanced features and functions are integrated into the driver itself, users can simply retain their existing motors and swap out the drivers for improved performance and control. Similarly, most specifications remain unchanged to ensure smooth upgrades. For instance, the same C-MOS negative logic (sink) is retained for inputs, and transistor open-collector outputs are still used instead of sink/source photocouplers. This allows for quick and uncomplicated replacement of older drivers. If you require more I/O options, consider exploring the digital setting type drivers, which offer six inputs and four outputs. --- **Motor Connector Location** Take note of the location of the motor connector, which has shifted to the left side of the new drivers instead of the right. Digital setting type drivers also feature a USB connector. After installing the MEXE02 software, connect your PC using a USB 2.0 cable. --- **RS-485 Communication Type Driver** To address monitoring or predictive maintenance needs, or simply to reduce wiring complexity, a new RS-485 communication type driver is available. This driver adds two communication ports and is compatible with MEXE02 support software. Once connected to an upper-level host controller, it sends real-time updates on various status parameters. Specifications such as speed regulation and speed range remain consistent with those of the digital setting type driver. Note that RS-485 communication type drivers are not currently available for 100W motors. --- **Part Number Changes** Another significant update for the BLH Series involves how we list part numbers. To provide greater flexibility to customers, Oriental Motor has transitioned from package part numbers (which included a motor with a dedicated driver optimized for performance and guaranteed specifications) to individual component part numbers. This change gives customers the freedom to create their own custom packages tailored to their specific needs. --- **Conclusion** The new BLH Series drivers represent a substantial leap forward in performance and functionality. Whether you’re upgrading an existing system or starting anew, these drivers offer unmatched versatility and reliability. For more information or to discuss your specific requirements, don’t hesitate to reach out to an expert today. Watch the BLH Series gear motors in action with this video demonstration: Feel free to watch more demo videos [here](#). Discover the full potential of the BLH Series by downloading the brochure or white paper on AGV/AMR designs.

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