{"id":17451,"date":"2020-07-20T10:00:00","date_gmt":"2020-07-20T09:00:00","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=17451"},"modified":"2020-07-17T10:24:35","modified_gmt":"2020-07-17T09:24:35","slug":"drive-controllers-and-filters-minimise-power-losses-in-high-speed-machine-tool-spindles-and-turbo-blowers","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/drive-controllers-and-filters-minimise-power-losses-in-high-speed-machine-tool-spindles-and-turbo-blowers\/","title":{"rendered":"Drive controllers and filters minimise power losses in high speed machine tool spindles and turbo blowers"},"content":{"rendered":"\n

New drive controllers and motor filters for high frequency (HF) applications from KEB Automation<\/a><\/strong> are helping customers develop highly efficient machine concepts for turbo blowers and CNC machine tool spindles. <\/p>\n\n\n\n

The objective is to increase performance and protect the motor windings at output frequencies up to 2,000Hz.<\/p>\n\n\n\n

\u201cFor industrial high speed applications, we have developed particularly powerful drive controllers, which our customers are using to operate all common high frequency spindles and high speed motor types,\u201d explains Fabian Fischer, Team Leader Application Sales at KEB Automation.<\/p>\n\n\n\n

The associated motor filter technology is an important part of the drive package. <\/p>\n\n\n\n

HF motor chokes, input\/output filters and sinusoidal filters based on the latest core materials, ensure the long operating life of CNC main spindles and high speed compressors.<\/p>\n\n\n\n

The two main features are based on the winding protection and the stabilisation of the thermal balance of the HF motors. <\/p>\n\n\n\n

As Fischer states: \u201cBy using a specially designed HF motor choke, both the voltage level in the winding and the rate of voltage rise [dU\/dt] can be reduced to below 500V\/\u00b5s.\u201d<\/p>\n\n\n\n

Both are main factors that affect the lifetime of the insulation. In addition, there is a noticeable reduction in the high frequency spectrum and therefore an improvement in the power loss balance in the motor.<\/p>\n\n\n\n

For very thermally-sensitive systems such as air bearing spindles or the electromagnetic bearing of the rotor in blower motors \u2013 both the current and the phase voltage must be reduced to the torque-forming fundamental frequency. This requires the use of a sine filter.<\/p>\n\n\n\n

\"\"
Comparison \u2013 Switching frequency<\/strong> and Filter technique vs power losses<\/strong><\/figcaption><\/figure>\n\n\n\n

By using a motor filter, the physical properties and therefore the equivalent circuit diagram of the motor is significantly changed due to the filter\u2019s own inductance.\u00a0<\/p>\n\n\n\n

As Fischer says: \u201cIn order to adjust the components in the system in such a way that control dynamics, torque and shaft power on the motor side are not significantly reduced, we start at two points: firstly, through our own filter development, production and EMC test environment, and secondly, through additional control routines in the drive controllers.\u201d<\/p>\n\n\n\n

\"\"
Asynchronous motor \u2013 without and with different types of motor choke<\/figcaption><\/figure>\n\n\n\n

Resonance-free operation<\/strong><\/p>\n\n\n\n

For correct operation of the sine filter, the output circuit can be checked for the natural frequency and the filter-internal components can be dimensioned for resonance-free operation. For large series, it is possible to tune an application-specific sine filter to the operating point of the customer\u2019s machine.<\/p>\n\n\n\n

\u201cHere, the power loss balance can be optimised in a way that would not be possible with any currently known modulation method and none of the common power stage topologies on the inverter side,\u201d explains Fischer.<\/p>\n\n\n\n

In addition, the motor\/sinusoidal filter output network can be adjusted in such a way that the power loss balance is improved by increasing the voltage at the motor terminals, respectively an increase in power at the motor shaft is achieved.<\/p>\n\n\n\n

The COMBIVERT F6 and S6 drive controllers from KEB feature software notch filters that generate resonance-free modulation for all speed-controlled operating modes, whether with or without an encoder.<\/p>\n\n\n\n

\"\"
Synchronous motor \u2013 with\/without sine filter<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

New drive controllers and motor filters for high frequency (HF) applications from KEB Automation are helping customers develop highly efficient machine concepts for turbo blowers and CNC machine tool spindles.  The objective is to increase performance and protect the motor windings at output frequencies up to 2,000Hz. \u201cFor industrial high speed applications, we have developed …<\/p>\n","protected":false},"author":1,"featured_media":17473,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105],"tags":[8616,8617,5034,8615],"class_list":["post-17451","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-design","tag-cnc-machine-tool-spindles","tag-drive-controllers","tag-keb-automation","tag-turbo-blowers"],"yoast_head":"\nDrive controllers and filters minimise power losses in high speed machine tool spindles and turbo blowers - Engineer News Network<\/title>\n<meta name=\"description\" content=\"New drive controllers and motor filters for high frequency (HF) applications from KEB Automation are helping customers develop highly efficient machine concepts for turbo blowers and CNC machine tool spindles\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engineernewsnetwork.com\/blog\/drive-controllers-and-filters-minimise-power-losses-in-high-speed-machine-tool-spindles-and-turbo-blowers\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Drive controllers and filters minimise power losses in high speed machine tool spindles and turbo blowers - 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