Page 70 Continued from previous page


the use of CAN and LIN automo- tive communication protocols. Seica’s Compact BMS is


equipped with specialized tools and battery cell simula- tors designed to carry out comprehensive functional testing of the BMS by accu- rately simulating the cell’s behavior.


OBC and Inverter The onboard charger


(OBC) is another vital compo- nent in electric vehicles, responsible for charging the


Electric motor test system.


www.us - tech.com


battery pack while the vehicle is stationary. It converts AC volt- age from the charging station into DC voltage to charge the


batteries. Since the OBC handles high power levels, the test sys- tem must be capable of assessing both high-voltage and low-volt- age operations. The inverter module works


in the opposite direction, con- verting DC voltage from the bat- tery pack into three-phase AC to power the electric motor. It also regulates voltage to control the motor’s power and torque and recaptures energy during brak- ing through a kinetic energy recovery system. To thoroughly test these modules, Seica has developed


October, 2024 Demand for Testing in the World of Electric Mobility


two specialized systems based on the Compact MULTI platform. The OBC module is tested using a specific test program and a fix- ture that connects it to the Compact Multi-OBC system. This system checks the module’s high-voltage insulation, per- forms safety tests, generates high-power single/three-phase AC voltage, monitors and con- trols power output, and simu- lates the battery pack. It also calibrates


internal sensors


under full power, performs leak- age tests, and verifies the integrity of connectors (e.g., checking for bent pins). The sys- tem integrates easily with the company’s MES (Manufacturing Execution System). For the inverter module,


Seica offers the Compact Multi- Inverter. The testing process is similar to that of the OBC, but instead of simulating the battery pack, the system simulates the electric motor. Seica’s innovative approach


uses a balanced three-phase load with an inductive Y-connection, minimizing power dissipation while allowing for testing at max- imum current, leading to signifi- cant energy savings.


Electric Motor The electric motor trans-


forms electrical energy from the inverter into mechanical power to drive the vehicle’s wheels, with speeds that can easily exceed 20,000 RPM. Testing all aspects of an electric motor’s per- formance requires specialized knowledge and a custom- designed testing system. The test involves using a


torque sensor on the motor shaft to measure the force the motor can handle at maximum speed. To simulate the load (the vehi- cle), a second motor is used, either acting as a load (braking motor) or as a motor to simulate regenerative braking. In this setup, the braking motor func- tions as a generator, feeding the generated energy back into the power grid to save energy. Seica offers the EMT EOL


line for electric motor testing, which is specifically designed for this purpose. With three differ- ent models (250/600/3000), the system can handle a wide range of electric motors. These systems are built on Seica’s VIP hard- ware and software platform, ensuring they can be seamlessly integrated into production lines, traceability systems, and compa- ny MES, supporting Industry 4.0 standards. Contact: Seica, Inc., 110


Avco Road, Haverhill, MA 01835 % 603-890-6002 E-mail: davidsigillo@seicausa.com Web: www.seica-na.com r


See at electronica, Hall A3 Booth 459


See at MD&M MN, Booth 3338, at SMTAI, Booth 2717


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96