Pressure load and leakage test
For impulse testing with long-term pressure and burst testing, our bobbins are tested at an ambient temperature of -60°C up to 180°C. Separate control circuits supply 50% glycol at temperature of -25ºC up to 120ºC. Tests are possible at very large temperature differences.
Various servo-hydraulic pressure intensifiers, optimally designed for each test area, allow very precise control of the pressure. Pulse-pressure tests can be carried out with a frequency of 0 – 10 Hz (usually 0.5 – 2.5 Hz) with a trapezoidal curve of 4 – 25 bar and 0 – 160 bar. For the sinusoidal curve with a frequency of 0 – 10 Hz, pressures of 0 – 6 bar are possible. All test procedures and data such as leak rate, pressure drop, or flow rate are automatically stored on the system and exported to the network for evaluation.
Thermal shock testing
Thermal shock conditions are produced by rapidly moving the bobbin between two extreme temperatures in less than 5 minutes, thereby creating a shock condition. The time the coil formers must remain at a temperature extreme before reaching equilibrium can vary from a few minutes to an hour. Testing for thermal shock is done to many specifications (DEF-STAN 00-35, IEC 60068, MIL-STD 810). Temperatures can be varied from -65°C to 190°C at change ratios greater than 5°C/minute.
Shock and vibration testing
Vibration testing and shock testing are used to simulate in a controlled laboratory environment the extreme conditions that bobbins may face during use, such as mishandling, dropping, and shipment. Our shock testing laboratories can do electronic assembly and computer equipment testing, avionics and military hardware testing, such as Mechanical Environmental Tests AECTP 400, ISO 9000, MIL-STD, AS9000, and RTCA DO-160 Section 8 tests, telecommunication, and satellite component testing and other.
The magnetic component with Coolgap bobbin is inserted into the test chamber and connected to the test medium circuit. To simulate magnetic component operation in an electric vehicle, a low voltage or high voltage power supply is available. The test medium (water-glycol mixture or pure glycol) circulates at a freely controllable temperature of -35 to +100 degrees Celsius and a volume flow of 3 to 30 l/min. The temperature of the test medium at the inlet and outlet of the test specimen and the ambient temperature are continuously measured. The flow, pressure and pressure drop as well as current and voltage in the high and low voltage range are also documented. The focus is on the thermal and electrical performance of the heating and cooling unit under varying environmental conditions. Component’s losses can be compared with both thermal and electrical results.
Apart from the previously mentioned tests, Coolgap parts are submitted to other tests such as dimensional testing (ensuring the high, reproducible geometric quality of our products), chemical compatibility testing (evaluating the resistance of plastics to various coolants) or humidity resistance testing (to test the corrosiveness of our products at all climates and levels of humidity).
picture from csmachine.de