What Conditions are Necessary for Selecting an AGV and AMR (Transport Robot)?

The following conditions are necessary for selecting a motor for a transport robot.
① Equipment Conditions (Weight, Driving environment, Number of transport axes and Wheel diameter, Power supply voltage)
② Operating Conditions (Driving speed)

There are quite a lot. I would like to know which elements of the selection calculation are involved for each factor.

① Weight, one of the equipment conditions, is a necessary factor to determine the required torque and permissible inertia of the motor. Also, the load carrying capacity at standstill is determined by the permissible radial load. There is a limit to increase the permissible radial load with parallel shaft gearheads, so for customers who want to increase the load carrying capacity, I think it's a good idea to introduce the hollow shaft flat gearhead or flange drive adapter. When the flange drive adapter is assembled, it has a high strength of 1,500 N and the hollow shaft flat gearhead has a maximum strength of 2,040 N.

I see. By the way, what are the driving environment conditions?

The driving environment is the slope of the place or surface on which the vehicle is to be driven. The friction coefficient varies depending on the location where the device runs, but on a flat floor in a factory, use the friction coefficient about 0.1 as a reference.

I understand. Is the number of transport axes determined by the number of wheels?

The number of transport axes are the number of motors required to drive them. The required torque changes depending on the number of motors used. Most of transportation robots are 2-wheel drive. The general method is to use 2 tires to drive the vehicle and 4 tires around them to distribute the load. If a 2-wheel drive is used, various design methods can be considered depending on the location where the transport robot is running, such as being able to turn in a small space.

I thought the number of wheels and the number of drive axes are the same! Are there many kinds of power supply voltages?

24 VDC or 48 VDC is common. Oriental Motor also release a 400 W type that can run by 24 VDC. Instead of using 4 12 VDC batteries to make a 48 VDC battery, using 2 batteries to make a 24 VDC battery will cut the installation space in half and reduce the weight of the main unit.

Now I get it!

Next is driving speed, which corresponds to ② operating conditions. The driving speed is a necessary factor to determine the speed of the motor. The required speed will also determine the gear ratio. The BLV Series R type features speed control range of 1~4,000 r/min. It can meet the needs of those who want to reduce the speed when starting or stopping, but want to maintain the maximum speed while operating.

How convenient! I will continue to study so that I can not only take in the numbers needed for selection calculations, but also provide useful information to our customers!