International Journal of Power Electronics and Drive Systems (IJPEDS) Vol. 14, No. 1, March 2023, pp. 51~59 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v14.i1.pp51-59  51 Journal homepage: http://ijpeds.iaescore.com Analysis of linear motor with symmetrical EMF vector for household elevator application Nor Aishah Md Zuki 1,2 , Raja Nor Firdaus Kashfi Raja Othman 1,2 , Fairul Azhar Abdul Shukor 1,2 , Suhairi Rizuan Che Ahmad 3 1 Fakulti Kejuruteraan Elektrik, Universiti Teknikal Malaysia Melaka, Melaka, Malaysia 2 Electrical Machine Design, Power Electronics and Drives Research Group, Universiti Teknikal Malaysia Melaka, Melaka, Malaysia 3 Universiti Kuala Lumpur-British Malaysian Institute (UNIKL-BMI), Selangor, Malaysia Article Info ABSTRACT Article history: Received May 12, 2022 Revised Oct 12, 2022 Accepted Oct 25, 2022 Linear permanent magnet synchronous motor (LPMSM) has emerged as a viable alternative to other linear motors for higher thrust lifting action. With the advancement of permanent magnets, LPMSM could contribute to energy conversation while also being suitable for applications requiring higher thrust, such as elevator. However, because the existing LPMSM is larger in size, it requires more space to be equipped with a household elevator. To address this issue, a new LPMSM with increased thrust capability has been proposed. The new LPMSM is modelled and analyzed in terms of back EMF and force in this paper. For improved performance, a symmetrical EMF vector is applied to the new LPMSM. In terms of back EMF and force, 4 LPMSM models are studied. According to the results, 6 slot 4 pole has the highest back EMF when compared to the others. As a suitable combination of slot and pole, a symmetrical EMF vector is the suggested LPMSM at the end of this research. Keywords: Elevator application EMF constant Force constant Linear motor Symmetrical vector This is an open access article under the CC BY-SA license. Corresponding Author: Raja Nor Firdaus Kashfi Raja Othman Fakulti Kejuruteraan Elektrik, Universiti Teknikal Malaysia Melaka Jalan Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia Email: norfirdaus@utem.edu.my 1. INTRODUCTION The world today is moving towards an aging society. Various places are reporting increasing rates of aging populations and its impact on the society [1]–[4]. A similar situation also happens in Malaysia [4]. Declining fertility and mortality rates have led to an improvement in the life expectancy of the population which has resulted in an aging population in Malaysia. Malaysia is expected to become an aging nation by the year 2030 where the elderly population comprises 15 % of the total population. Therefore, support system needs to be developed to help the elderly population to maintain independent living. One of the support systems that could help the elderly population is to improve the self-mobilization system. In term of horizontal movement, a wheel-chair with improved movement control has done a lot to help the elderly to move [5]. But, in terms of vertical movement, the elderly group needs to depend on the high-cost conventional elevator which is unpractical to install in their homes. Nowadays, most housing developers tend to build double-storey or even higher landed houses. Therefore, a small size and low-cost elevator system called domestic elevators is required in order to make sure it is affordable and practical to be installed at least for a double storey house to promote independent living to the elderly. Apart from the elderly group, this system will also be beneficial to disabled people [6]. In order to make the domestic elevator system friendly to this group of people, some researchers have included the Cloud and Mobile Device Control Feature specially to promote an IOT-based smart home system [7], [8]. Then, the current domestic elevator system uses either rotational type induction motors (IM)