![]() This is approximately 0.577 (1/√3) of the drivers applied voltage that can be applied to a single phase of the windings. Another issue with the Y winding design is that there is a 30 degree phase difference between the line voltage and phase voltage. In order to reduce the winding diameter, the design is changed from a Y winding to a Delta winding. However, when designing the BLV motor with a Y winding, thicker windings proved difficult to wind. To reduce resistance, a larger winding wire diameter was necessary. In order to drive the motor with a larger current, it is necessary to reduce resistance of the motor winding. Therefore, in order to achieve higher power with compact size, and to maintain a continuous duty rating, we needed to be a bit more creative with our winding design. However, current is proportional to heat so once we increase the current, we also increase heat generation. If we want to have higher power (P) at a low voltage such as 24 VDC (V), it is necessary to increase the current (I). The formula below states that power is proportional to voltage times current. We were able to improve our design from conventional products due to changes in the winding design. The variability of speeds used on AGVs/AMRs requires the use of higher performance motors. ![]() Delta Winding Offers Better High Speed Performance This helps free up space inside an AGV/AMR to accommodate other components or to reduce the overall size of the unit.ģ. Oriental Motor’s brushless DC motors are offered in a unique wider frame size and shorter case length (see Figure 2). While most brushless DC motors in the market are offered in a long cylindrical case, other motor considerations are brushed motors which are typically larger and require brush maintenance. When designing AGVs/AMRs, there are space restrictions for motor placement. The 50:1 speed ratio along with the tight speed regulation makes these motor ideal for AGV/AMR applications. This results in a servo grade speed regulation of either ☐.5% (analog setting) or ☐.2% (digital setting). Another advantage you may find from Oriental Motor’s brushless motors is that they feature plug & play and closed-loop feedback with their dedicated drivers. The BLV motor features flat torque characteristics up to rated speed which benefits AGVs/AMRs by having consistent torque performance within the rated speed range. A continuous duty speed range of 80~4000 RPM, as shown in Figure 1, can be achieved with these motors with a speed ratio of 50:1. Wide Speed Ratio with Plug and Play Speed RegulationĪs with most brushless DC motors, a wide speed ratio is offered with our BLV Series. In this white paper, we will discuss how each of the BLV Series standard features can help make product development easier. Oriental Motor offers the BLV Series brushless DC motors and dedicated drivers with features designed for battery powered material handling applications such as Automated Guided Vehicles (AGVs) or Autonomous Mobile Robot (AMRs). Download PDF 10 Standard Features for AGV / AMR Powertrain Applications
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